I bought the Logitech VX Revolution when I purchased my MacBook in the final days of 2006. I needed a notebook mouse and I'm extremely picky when it comes to pointer lag from wireless mice. The first wireless mouse I ever found to be better than a wired was the Logitech MX1000, which I can still tell has insanely small amounts of lag, but it is so close to a wired connection I can't complain. The VX Revolution, on the other hand, is the first wireless mouse I have ever used which feels so responsive that I would never be able to tell the difference between it, and a wired version (if a wired VX Revolution existed). I haven't used the MX Revolution, which is the desktop version of this mouse (with a couple more features), but I must say, the VX is the best [insert random expletive here] mouse I have ever used. Even though it's built for portability, I could easy replace my MX1000 with the VX as my desktop mouse any day.