Summary: The design is great and still looks good after months of use. Unfortunately it is lacking in some ways. My main complaint is the lack of drivers for OS X and Linux which makes this mouse less practical than a cheap generic mouse. There is no reason to use it instead of a touchpad on a Macbook as gestures don't work, and the lack of drivers on Linux means that it can't be configured at all (even if you have gestures enabled, as it won't affect this mouse).
Summary: I like the idea of the mouse. But once I used it I realized two things. 1. The glassy surface makes it very difficult for touch. I hope you don't have sweaty hands. If you do, put some chalk dust on them while you use this mouse. Otherwise your fingers will not glide smoothly. This a HUGE flaw I think. They tested this thing. Logitech knows. Why not improve? 2. The side scrolling does not respond as well as I'd like. Sometimes I just click bottom bar and move it.
Summary: This mouse has a lovely hand feel and weight, and the left & right click works very well, but the scrolling and swiping is very hit and miss, and sometimes has a mind of its own, scrolling around randomly when your hand is completely still. If the scrolling and swiping were sorted out, I'd give it top marks, but as it is, it can be really annoying at times.
Summary: Since the abilities of this mouse differ quite a bit between Windows 7 and 8 let me start by saying that I've used this product only on Windows 8. Lets start positive: - I've found this mouse to be lighter than expected, but that didn't make it feel cheap. - The touch surface is responsive, but it does take some getting used to. That said, I find it severely lacking when it comes to the advertised "customizable controls".
Summary: I just got this mouse today. I intend to primarily use it with Windows 8. Currently though I am testing it out with Windows 7 (Windows 8 should arrive in the mail in couple days for use with my newly build desktop). I have been using Windows 8 (as my primary computer) at work since about February, so I’m very familiar with Windows 8 and I think this mouse will be very useful with that OS. I like the size, shape, and overall feel of the mouse.
Summary: This mouse was expensive and supposedly allows the user to flick through Windows 8 apps, but it is a little uncomfortable to hold and use for delicately swiping with Windows 8. Personally I think that Windows 8 is best used with a touch screen. The mouse has the tendency to misinterpret clicks and take you back to a previous page, which can be infuriating. Also it is not that touch sensitive. I might not buy it again.
Summary: To aid context let me add some background - I use an Apple Magic Mouse with my laptop and at work, and I *really* like how they operate. So there's my benchmark... I'd been using a Microsoft Arc as my mouse for a while now but the wheel was starting to fail. Oddly I don't mind the ergonomics, which was something others have commented on while using my machine.
Summary: and i have to say I like the concept but at the end I decided to switch back to the traditional mouse. Reason n.1 is that it is not precise as it should be. Sometimes you touch the mouse and the movements are different from the previous identical touch. Good for the multimedia center but not that good for a normal office and windows use.
Summary: This is new technology and as such it needs further work and alteration in order to shine. The Gesture support is a good feature but the mouse is let down by the steep learning curve needed to get the best from it. I found the scroll function to be the worst aspect of this mouses function, the actual defined zone of the "virtual wheel" is too small and hard to locate.