The mouse fits comfortably in your hand, has a good weight (is not easy) and can be very precisely controlled thereby. To me, they could have like to be even bigger, but that's a matter of taste. I bought the mouse mainly to have the key shortcuts available in the image processing at your fingertips. By almost any configuration options is possible with this model for all conceivable combinations. There are always 4 different profiles for key assignments used simultaneously and switch between them (eg for the operation of various programs / games). These can be stored separately and reloaded. The only downside - is the configuration software for people with an IQ above the toast of not necessarily logical, intuitive and understandable. After I then found out that the keyboard keys are always displayed on an English keyboard layout, my macros worked finally.
Conclusion - a great part of what I do not want to give up - but the configuration software still holds immense potential for optimization.
A little hint: This mouse is corded! I have let myself be fooled by the pictures and thought that it is cordless. In these circumstance was no mention (at least not when I've bought it). Did they but keep still, because it is simply very good and I have not really found an alternative (and even not in this price range).