Summary: G500s clearly inherited this problem from G500, the optical lens is unfixed and easily moved when mouse moves, so does the cursor on the screen! I have a German version G500 since 2 years ago, it works well (before that is a China mainland version G500, with an unfixed lens). Now the new G500s has the same problem!
Summary: This mouse was wonderful, great and easy to use....however, after about 1 month of use, during gameplay I might add, all the macros just stopped working. It was so easy to set up these macros at the start, and now nothing I do will work right. Deleted the macros, set up new macros, and still multi-key macros will not work. I'm going back to Razer products, because their software just doesn't stop working. Hardware still works though.....
Summary: I was pretty excited about this mouse (big Logitehc guy) and I was looking to upgrade from my G500 because it randomly decides to stop working during gaming sessions requiring a reboot of my computer. Was at the store the day these hit the shelf and couldn't wait to use it! The first one worked the best, but when you used the middle side button, you had to press it REALLY hard for it to register (So hard, I reported that it didn't work at all on the forums thinking it...
Summary: This mouse uses virtually the same shape as the G500, G7, and G5 of previous generations. It feels good in your hand, the grip is nice and everything. Unfortunately they used poor quality materials inside and the mouse emits a high frequency whine that is even worse when in use. I could hear this from about five feet away. If you are going to try this mouse, buy it from a place that accepts returns in case you have this issue as well.
Excerpt: This mouse is very accurate, and combined with a hard surface mouse pad, is very very sensitive. It responds to the slightest twitch/tremor and is very precise. In FPS, I can acquire target with pixel level accuracy without having to lift up my wrist in the process.
Summary: I have to fix for the first time after 6 months (!) of use my mouse since i have the infamous double click bug. I have another mouse, Microsoft branded, which works wonders even after 8 years. I didn't expect a mouse costing so much and offering so few, this is probably the last time i buy a Logitech mouse.
Summary: I am an avid gamer playing mostly FPS (Battlefield 3) games. This mouse was great during the one year of service that I have owned it. Before this mouse, I owned the G5 which was by far the best mouse ever. However, Logitech decided to phase out the G5 in favor of the G500 with inferior parts. Now the mouse loses connectivity every so often during the game that usually results in an adverse outcome during my gaming sessions.