Yes - LOVE the VX Nano. It's a relatively simple little USB wireless laser mouse, but it works super smoothly & dependably.
As Curunir_wolf mentioned, the USB "Nano receiver" is very small - when plugged in, it only sticks out about 1/4", and is designed to butt up against the side of your laptop very snugly, so you don't have to worry about it wiggling or snagging on anything. The only time I ever need to remove it is when I'm working from home & want to use it with my work laptop.
Also as anakha said, the battery life is very good. I've had the thing for about a year, and have only had to change batteries twice. Luckily the little status light just below the scrollwheel starts blinking red when the juice is getting low.
I actually went out of my way to find a wireless mouse that was NOT rechargeable...I prefer incurring the cost of two AAA batteries every four months than having to charge my mouse every other day, then having to deal with its charge running low, etc.
Finally, some caveats:
- The VX Nano is a smaller-than-average mouse. If you have large hands, or are only comfortable cupping your entire hand over the mouse, this might not be the mouse for you. This mouse is definitely designed for the claw technique.
- The latest version of Logitech's OS X software (Logitech Control Center v2.7) is not compatible with World of Warcraft (if you play, that is). Everytime you try to use the scrollwheel in-game, the cursor will jump to one of the top corners of your screen. The solution is to download an older version of the LCC (2.1, I believe). There's a WoW forum thread that includes a (malware-free) link to the older LCC download, I've used it successfully in the past...I'd link it here, but I'm at work & WoW-related links are locked down.
- Many people who hate the LCC software (for the reason outlined above, among other things) have successfully gotten all of the VX Nano's features to work using SteerMouse (and other freeware OS X mouse utilities). Personally, I don't really care either way...I use LCC v2.1 with now problems. I have the center "search" button configured to activate Exposé's all-windows mode, and have the two small buttons by the left mouse button configured for page back and page forward.