The EVGA X20 mouse is great for MMO gaming, but it doesn’t have as many buttons as a dedicated MMO gaming mouse. That said, you can reprogram all of the buttons on top of the mouse using the customization software. Performance-wise, it has low click latency, and you can adjust the CPI precisely by increments of 50 within a wide range. It also has a low minimum lift-off distance, but it’s higher than on many similar gaming mice, and you can’t adjust it as low as EVGA advertises on the unit we tested.