I was looking for a decent and practical wireless mouse for my daily job and gaming when required. The G603 and the G305 are in that sweet spots.- In contrary to G Pro or G703 or others. the G603 uses AAA batteries that offers good battery life. A G Pro or G703 works for about 24h per charge. The G603 works for 500h of gaming, or 18 months in endurance mode!! I use the endurance mode every day, and just switch to gaming mode when required.- I can switch from HI (Gaming - 1ms report rate) to LO (Endurance - 8ms report rate) from the button bellow the mouse! No software required! I Love that!- NO RGB. I hate to pay for useless features that adds weight and even reduce battery life. This is perfect and would fit a working environment.- Good buttons feel. I like the big next/previous buttons. The wheel is good too, even if not the best. (Note: I HATE the MX Master / Mx Anywhere kind of wheels).- Unfortunately the shape is not my favorite for my hand and grip, but it's ok. I like my mouse almost flat and thiner, I think I should have preferred the G305 for this reason. But this is very subjective.