I just got my Corsair M90. And I love the feeling, the grip, the movements. Some may complain it's too heavy and not adjustable... I'm one of these weird guys who prefers it even heavier XD
But but but, the mouse buttons for the thumb are really freaking tough. They are so hard to press that it just strains your muscles. Yesterday I had to press the push to talk button (located at the thumb), for like 5 minutes and after releasing it, my hand was almost numb. Also during the tournaments in gw2 there is no time to rely on these buttons and I actually bought it for that.
Does anyone have a solution for these tough buttons, or should I return to the store within my 8 day no good guarantee? I would not like it since everything else is perfect. Just these damn buttons.