I struggled to adjust additional mouse buttons with the program which I must confess is not at all intuitive but once successful, a real pleasure.
The mouse is quite heavy which for me is a plus (not for all the world why I point), a super grip. The buttons are well placed (we must take the kick but once doing is a treat)
I play with on fps (BF 4)
So I advise you if you avze the courage to go through this software ^^ but if I succeeded, you will get there;)