Summary: Definitely not your average mouse. Works well with Windows 8, although it took some experimenting to find finger motions that worked consistently. After a while, it felt completely natural and I stopped thinking about it.
Pros: Convenient, lightweight, and reliable. Has an on-off switch to conserve batteries.
Summary: I thought these were pretty cool looking when the came out last year, but the price was kind of high. Picked it up on sale for $25, it's pretty good. Nice and light, cordless, comfortable and a good set of touch gestures. The software is easy to use too.
Pros: Light, responsive, comfortable, has touch, software is easy to use.Good price at $25-$35.
Cons: Non sale/MSRP price is way too high at $70. You can just get an Apple Magic mouse at that price that uses more premium Glass/Aluminum materials.
Summary: I purchased this mouse on sale (over 50% off), so the price was right from the beginning. I originally stayed away from the mouse because of the negative reviews, however, so far the product works exactly as advertised.
Summary: I use an Apple Magic Mouse at work on an iMac and have loved it from day one. When I was looking to upgrade two computers at home to Windows 8 I wanted something similar. Seeing the Magic Mouse didn't work as well on Windows I searched for alternatives.
Summary: Pros: Does everything advertised and the shortcuts are nice in Windows 8, Specially the start screen, desktop, and charms gestures. They also allow you to customize the gestures a bit if you don't like the default ones.
Summary: I just got this mouse after I returned the T650. The T620 is a much better purchase. I am not a big fan of the flatness of it but I digress. A few things that bug me is that after a while your fingers start to get sticky and the right swipe for the charms becomes near impossible to use.
Summary: Been using this now for the best part of a year and it's a very good device. You can happily use Windows 8 with a normal mouse once you learn the shortcuts, but this mouse removes the need to do that and, I find, is very intuitive.
Summary: However, it's worth persevering as after a while it becomes second nature. It works well with Windows 8 and has meant that I have abandoned plans to buy a new touch-screen momitor, saving me quite a bit of money.