Modern design.
Flatten for easy and space-saving storage.
Flatten to turn-off to save energy ... (very cool to slam the mouse down when I am done for the day, instead of looking of the tiny button at the bottom of a mouse to switch off and risk staring straight into the laser :)
The touch scroll with the flick allow for faster and easier scrolling.
Great battery life.
Easy to maneuver; found no issue moving side to side or any directions for that matter.
It works on my leather sofa!
Weaknesses:
Have to get used to the arch.
The buttons are not as sensitive as I am used to.
Summary:
Very good mouse. I use it all day and find it extra flexible when I am working from home and ran out of surface to use a mouse, I can pretty much put it on any surface and it just glides around, thanks to its arch design that eliminates much of the surface contact requires.
Innovative design
unique look
sleek
slim
portable
vibration feedback to simulate click of wheel is very cool.
Weaknesses:
No travel case or pouch.
Very precise finger placement required on buttons and touch pad.
Arch design is inherently not very stable when moving the mouse side to side.
Summary:
Kudos to Microsoft for coming up with a very innovative design, however, mice need to also be functional and this one isn't. If you prefer to have a cool looking mouse while you surf in the coffee shop, then buy it. But if you're like me and you need a mouse that will do what its supposed to do all day long and not be a constant annoyance, then look elsewhere.