Summary: Everything about this mouse is budget. Budget feel of quality. Budget hardware. The max polling rate is 500 Hz. It has a very distinct plastic feel. The mouse buttons starts squeaking with every click after a while and the button becomes a little unresponsive. However, the mouse is inexpensive and the tracking is perfectly fine. The shape is pretty solid as an ambidextrous mouse. The weight is fairly light and is even lighter if you remove the internal weight.
Summary: The mouse was great until the left mouse clicker started squeaking, had to return the mouse after only a week or so of use. It seems like a common problem with this mouse. I would pay a little bit more for the Anker 8200 DPI mouse-- it is simply put, a superior mouse in every way. Best to get it on sale though, I was able to get it for 30$.
Summary: I got the Logitech G100S almost a year ago and was happy with it until three months later; the left button clicks weren't always working / being detected by the PC. I contacted Logitech and a new one was sent to me under warranty. Now, 10 months later, it appears this second mouse also has a worn out or faulty left button.
Summary: A longtime Razer Deathadder user, I've been trying this mouse out because I'm not a fan of the new deathadder. I've used probably 6-7 different gaming mice before, so my sample is limited, but this mouse had ludicrously good tracking. the sensor is absolutely unreal. the experience was, however, ruined to some point for me by the incessant squeaking of the left click button. i was very impressed with the mouse overall, but the squeaking is just too irritating.
Summary: Summary: G100S is the best mouse that Logitech has at this time. I'm personally waiting them out. I'm still using my G3 until Logitech goes for another cash-grab and finally gives us another G3. At which point I'll be forced to buy 2 or more, because I can't trust Logitech to keep products on the market. Stop iterating the entire lineup. Mice are a mature market.
Summary: Gaming mice have a reputation for being expensive, festooned with buttons and with outlandish styling. However, the G100s is none of those things. It is to all intents and purposes a fairly generic optical mouse with gaming pretentions. It is very responsive and quite comfortable in the hands, but it is unnervingly light, almost feeling cheap and hollow.
Summary: The buttons could be more sensitive, it could be wire free. But for a value mouse it holds its own however the buttons are not programmable and there's only 4. The description was a little misleading. That's why this mouse gets a three.