The design's charming and very small: one side door pops open easily to accommodate a single AA battery that powers the mouse. Pairing is as easy as a simple button press underneath.
The Wedge Touch Mouse is an elegant, well-designed ultraportable mouse, but it's not revolutionary. It's meant to add traditional input to a hybrid device like a Windows 8 tablet, not offer any advanced touch-pad functions. I've often wished that the iPad had mouse connectivity to go with a keyboard; add a keyboard like Microsoft's, and you'll have a pretty (and pricey) portable desk set.
Yes, pricey: the Wedge Touch costs $70, and that's a lot to pay for a tiny mouse. I expected a price closer to $40. Other mice are out there that offer similar functionality, and cost a lot less. They're not all as attractive as the Wedge Touch. If you have money to burn and want an ultraportable mouse at any cost, the Wedge is a pretty pick. I just can't personally justify the expense.