Very good 22 Mouse

+ Good catch in hand easily configurable with the attached program.
+ It can weigh down the mouse for better balance weight using weight 6 joints (very good idea).
+ The finish is very clean level with some reputable brand (Razer, Roccat)
+ You just change the cursor scroll mouse speed very easily (dpi).
+ A slightly kikou tools allows you to change the color of lighting at the hand of apple, not super helpful in the state just nice for people wanting to match their mouse to the color of their key ... :)

For my use primarily Game MMO, I am very satisfied, no problems with and responsive.
4 really configurable buttons (Other buttons right click, left, knob and button dpi though editable are essential in the state so no interest to change their features ...), very good complement to my Razer Nostromo associate.

Perixx is a brand I did not know but that is worth seeing and hold promises for Gamers.