First, I must admit that I already have an Apple "Magic Mouse" that came with my iMac, and I generally find it effective and intuitive. But there are times when it's so exquisitively sensitive, so motion-sensing on its surface, that it "gets away" from my digital dexterity (and my memory of where to place and move my fingers, or whether to use 1, 2 or 3 fingers). Especially when I'm in a hurry, the "Magic Mouse" seems to take on a life of its own, one that is not always in agreement with my immediate purposes and pressing needs.At such moments I've found it most expedient simply to set the Magic Mouse aside and go to a Logitech wireless M-5 or M-10, both exceptionally simple and dependable (not to mention colorful) little creatures. The problem, however, is the tiny receiver that you have to insert into a computer's USB port and then remember to replace in the mouse (unless you have more USB ports than I). It's the 2nd part--putting the receiver away in the only place you'll find it--that eludes me time and time again. I've gone through 3 of the critters in the last two months, and at a cost of $20-$30 per mouse, such an expenditure on mice can be as budget-breaking as maintaining a St. Bernard. (I've even suggested to Logitech that, while it's understandable that each mouse must have a tiny receiver dedicated to that specific mouse, it might be a good idea--and even engender good-will toward a currently struggling company (tablets are savaging computer-accessory makers these days)--to make the M-5 and M-10 "hybrids" by including a thin, optional wire that could be used to salvage a mouse that has lost its brain-receiver).Too bad the company has not heeded my suggestion because I've decided I simply can't afford another wireless--at least not for a while. Of course, Logitech makes a wired model that is not only comparable in price with the Kensington but is currently out-selling it by an apparently wide margin. I suspect it may even be a better mouse in some respects than the Kensington. I've simply lost interest in all Logitech mice--at least for the time being.As for this Kensington Mouse-in-a-Box, it's not pretty but it's entirely serviceable and, moreover, is a no-brainer to operate. (My only complaint is the ease with which I can press the scroll wheel downward, a gesture which displaces the entire screen in front of me.) For the most part, it answers my occasional needs for a "non-Magic" mouse perfectly. And I doubt that it's going to escape from its box anytime soon (just in case, I've put a Ritz cracker with peanut butter alongside it).I bought this to replace a Logitech B100 that died after 15 months of careful use.The tracking of this one seems a bit smoother. The cord length is the same, which is also good. The scroll wheel moves easier too without any kind of modification.The clicking noise is a tiny bit louder with the Kensington. The right mouse button "clicks" while the left one "clocks" in terms of sound... tick/tock, whichever you prefer. The scroll wheel's button has a more pronounced "clock" sound and is too easy to press down - I'm constantly accidentally clicking the scroll wheel when trying to scroll up. EDIT: I have become accustomed to the sensitivity now, and I rarely have this problem.The right mouse button takes a little less force to click, so I'm lucky to have a light hand or I'd be a bit frustrated with that. EDIT: both buttons seem to be about the same now.One commenter mentioned that this was not level; I tested mine out and it's not level either. The mold for the bottom half of mouse is probably uneven, so they'll all turn out the same. It's only off by a millimeter or less and isn't noticed on a typical mouse pad. EDIT: it somehow seems to have flattened itself out over time and use.One minor annoyance - major if you like a dark room - is that the red light shines up through the space around the scroll wheel. A lot of red light gets through, but it shines away from me.It's too late for me to return this now, but I would if I could because this scroll wheel is becoming a big issue. It fails to scroll maybe 1/4 of the time... like, when scrolling down a page: it will scroll, scroll, scroll, nothing, scroll, scroll, nothing, scroll... It was rare but seems to be happening more and more. EDIT: this issue seems to have fixed itself.4/5-1 for the clicking sounds and light shining through the top.I use the computer a LOT. All day, every day. For as long as I can remember, I've been going through mice like water. I've tried every brand out there, multiple times - cheap mice, expensive mice, all kinds of mice. I could probably start my own mouse graveyard in my backyard and there would be enough graves back there to scare all of my neighbors. Some mice lasted a couple months. Others only a couple weeks. Anything that lasted me six months was considered a Mouse of Champions. I quickly learned to not waste my money on the expensive mice, because they died on me just as often - but cost several times as much.I simply cannot possibly portray to you people the level of failure I experience with mice. Really. You're going to have to just trust me on this one. It's EPIC....and this mouse has failed me now, too. Mind you, it's only the beginnings of a failure. Nothing major. Just enough mis-clicking and erroneous double-clicking to let me know that it's on its way out. But I found myself not knowing how long this one lasted. Perhaps I was going mad? It couldn't be that I'd bought it long enough ago that I... lost track?So I came here to Amazon to see when I purchased this mouse. Oh my Ra. Could this be? Nearly TWO YEARS ago?? Surely, there must be something wrong here. A mouse has lasted me nearly TWO YEARS???This is nothing short of a miracle, people. Either this mouse hasn't fully died in TWO YEARS of my usage... or the mouse has become sentient and has hacked Amazon's database to change the purchase date on my account. In either case, I feel it is probably in my best interests to purchase another Kensington Mouse-in-a-Box to replace the one that is slowly failing on me. Either I can expect another quality mouse that will last longer than literally every other mouse I have ever owned... or I will be starting my own army of sentient mice with computer programming skills. Win-win, really.I have used this Kensington mouse daily at work for more than two years with no problems whatsoever. I just purchased a second one for my home office. It is light-weight, responsive, and comfortable in hand. A few users have commented that this mouse is a little small for their taste. They probably have larger hands than me. I find it to be the perfect size. Despite its light weight, this Kensington mouse is very durable. It has lasted longer than any mouse (wired or wireless) I have previously owned. It is also one of the least expensive wired mice available, making it an exceptionally great value. Personally, I prefer a traditional wired mouse to the wireless models. I never have to worry about the mouse losing its charge at an inconvenient time and it's more environmentally friendly. If you are looking for an inexpensive but reliable basic mouse, I highly recommend this one.I've been returning to wired mice as I am sick and tired of having to find which machine the usb adapter is plugged into - the mystery of who belongs with whom. Also the fact that wireless mice are battery hungry.At least with a wired mouse you know exactly which machine it belongs to as it is on a leash and being attached on a shortened cord (wrapped and tied) if it slips off the table it will dangle not go smash to the floor.Think of all the batteries you won't be using and your eco footprint shortening. a little.It seems to produce precise movements on the monitor and no cursor jumping happening.I like it, especially once I fixed the PROBLEM.The problem is that it emits a strong light through the opening around the scrolling wheel. So, the light is pointing slightly upwards through that hole. It can reflect back to your eyes if your screen is low from the table (3-4 inches).I had to disassemble the mouse and put a cover in front of the light that points up and forward.This is the 2nd one I ordered, still using the first one for a few years now, at a rate of 16+ hrs/day 6-7 days/wk, 52wks/yr; no problems with it. Bought this 2nd one for a back up because I like it, it’s reliable, sounds contradictory but its for redundancy/zero down time and it’s an Amazon Add On item so I might as well get it.Size is a bit small but its ok. My hand size is average. Weight is light, which I consider a positive feature for extended use. It glides smoothly on a surface and haven’t had any issues with the optic sensor. Construction is solid, no flimsy parts/buttons. DPI is smooth and precise, with the Windows mouse settings on the fastest speed. I have an extended desktop, 3 x 27” monitors at 1080x1920 plus a laptop screen and this mouse speed is fast enough. I could imagine an expert gamer wanting a slightly higher DPI so this mouse could leave them wanting a tad bit more but its not an issue for me.I’ve used a cheap $14 gaming mouse from Amazon, concurrently with this first mouse a few years ago and that gaming mouse wheel broke from zero abuse/regular use and this mouse is still going and costs even less. The bottom half of the body of the mouse is actually grey but the top is black. I don’t know why they wouldn’t just make the whole mouse black, it would look much better, but I guess they were going with a theme because the rubberized scroll wheel/button is also grey. I like using a wired mouse to reduce EMF exposure and eliminate having to deal with batteries/charging. Cable length is standard and good enough.When I was reading other mouses reviews the reviewers said that the mouse had a high pitched sound when ever it clicked on the mouse or the mouse didn't feel comfortable... But this mouse has a great price to it compared to other mouses on Amazon and it works perfectly.