It's a quite good mouse. It's working both wired and wireless way perfectly.
I'm a leftie and I'm having a great time with this mouse. infact this is the best pro wireless mouse I've tried. battery life lasts a few days and the lights will flash red when you run low, the software is really easy and functiounal, but you can't know how much battery you have left. accuracy is good enough for graphic design work and the ability to switch to a slow pointer speeds with the dpi button is very handy. as per ergonomics, I use it with both wings on so my thumb an pinky don't drag on the table. the feet are nice and smooth, and glide alright on most mouse pads and tables. the packaging was impressive and would look great as a present.