Summary: Great mouse for what I needed. The reason it is not a 5 star review is because the keybinds I assign to my buttons are often not activated upon restarting the computer or unplugging the mouse and using it on a different computer. I have tried saving out profiles, but I still frequently have to reassign those buttons binds and/or reopen the Razer Synapse software to get them to activate.
Summary: Overall I found this mouse to be great. It has great customization, right amount of buttons (that are mechanical and feel so much better than regular extra mouse buttons), fits good, buttons are in good spots, but... as it seems with a lot of razer products they have a tendency to fail. After about 8 months, the mouse would start not moving at random times, or would move in some direction but wouldn't register others.
Summary: I have made the switch from the Logitech G600 to this gaming device and so far (only in use for a few days) it seems to fit real well into my play style. With a centered thumb rest I have better movement control and easy access to the buttons arranged around that centered position. It is still a little more narrow than I would like it to be but I can definately see an improvement over the G600 control-wise.
Summary: It's deceptively sturdy for feeling so light and toyish. It's my main mouse for now, but it's still not my ideal mouse. I would much rather have 1 big button that could be 'rocked' or tilted in 4 to 8 different directions (D-pad), instead of 6 individual buttons that the thumb must 'reach' for.
Summary: A solid mouse. It is a little small, but that is not a problem for me. The performance is good, and the quality has been great as well. The surface is slick and will collect gunk if you have sweaty hands, so be sure to clean the mouse regularly.
Summary: I've owned this mouse for two weeks. From my experience, I haven't ran into any software issues or malfunctions. For what it's advertised to do, it does well. Easily programmed using Razer's Synapse 2.0 software and it changes configs when I load certain games. Again, for what it's advertised to do, it does and does it well. The biggest issue I have is the size of it. It doesn't look that small in the picture and my hands aren't that big.