Greeting to all using Logitech mouses or keyboards, you know they rock!, I just wanted to share, I just got the G502 Spectrum 2 weeks ago, I replaced a G500 (as in NOT the G500s), that the right button was starting to fail (so ZOOM on FPS and MassEffect was getting problematic), I havent got used to it, YET, too much time with the G500 i guess (2+ years), (well actually im still using the G500, right now in with my laptop, hehehe), but I can appreciate the goodies on the G502, its a GREAT mouse, and the sensor is noticeable better. I end saying that I've been using Logitech for 20 years (maybe more?), hell, I still got a SERIAL (BALL!!) Logitech Mouse that works (hard to find a computer with serial port to use it tough), The g500 still working (just no gaming), I got the G5 (alas its not working anymore, but if I remember correctly it survived a left button surgery on the left button sensor (push-switch), that made a hole in the plastic base of the button (loooots of gaming). For me in mouse and keyboard, its Logitech or nothing. (I admit I had a MS Natural keyboard, but its not here anymore... my wireless logitech dated 2002 IS, using it in home server)