Any review of the quality and performance of the G502 Proteus Core will apply to this mouse as it is simply the same mouse with no blue plastic and the addition of RGB lighting. I tried other gaming mice at this price point and just couldn't do without the flick-scroll functionality of the Logitech scroll wheel. I'd grown accustomed to my old Logitech G9 and this mouse matches or improves upon every aspect of that mouse. The Logitech Gaming Software, that manages the button, sensitivity, and color profiles, is lightweight and easy to use (only uses about 30KB of memory to run in the background). If you don't care about matching color with your other components or keyboard, then stick with the Proteus Core. Otherwise, I highly recommend this mouse for top-notch performance, comfort, and aesthetics.

The mouse I had lasted for about 20 years until it died on me so I was very out of the loop when it came to a high performance mouse to use. I went to the stores trying out each one on how it feels and have to say the Logitech G502 is the best feeling mouse for those who enjoy thumb support when using. PROS: Mouse is made well, has grip sides and rest support for thumb Multiple customization buttons and speeds Able to setup multiple profiles, I found this useful for "game mode vs standard mode" Software makes it very easy to customize every setting on the mouse Includes weights for the mouse to set the drag to the level you like CONS: Price , I feel it is a little overprices versus competitors Software must run in background Overall I would recommend this mouse for anyone who enjoys a balance between everyday use and a gaming mouse. The buttons are not too extreme at the same time very customizable to support your type of gameplay.

The amount of options for the price I paid is just unbeatable. I use a 34 inch ultra wide monitor so high DPI was important to me. You can set up to 3 different profiles with multiple levels of DPI on each which is exactly what I need for different situations. Another thing I didn't realize this mouse has until I started using it was an unlock-able scroll wheel. This allows you to flick down/up for smooth click free scrolling. I don't know if I could live without this now. Overall with the button placements and nice thumb rest this is a very comfy to use mouse as well. It could be too large if you have smaller hands however. I paired this with a ROCCAT Taito Control (mid-size) mouse mat pad and can get precision down to a speck of dust.

I was extremely fond of my old G500 mouse, with its button layout, scroll selector switch, and weight customization. When it broke and I got a G700 replacement I was disheartened to see those features gone. Now with this G502, I have those back and custom RGB to boot. Set up my custom macros and etc in Logitech's driver and control suite and I was good to go. Would recommend.

Because I do work as well as game, the big sell point for me was the scroll wheel. Perfect for my hands, which are big, comfortable after long hours of BF4. You can't go wrong with this mouse. Like it so much, I bought one for the office.