I am very satisfied with the ergonomics of this mouse and the various features offered. However a big problem looming on the mouse pads. They literally took off after only 15 days of use. It's very disturbing and very unfortunate for a mouse that is "gaming". I have a Razer Goliatus very good and when we begin to feel that it hangs it's still extremely problematic. 2 stars because I take for a mouse at this price and that wants high quality, it is not normal !!!