I've had a Corsair M65, which I was very unhappy with, and the middle mouse failed on it after a small time, as well as the sensor eventually.
And now my second mouse, the Mionix Avior 8200, which I have been very impressed with so far, has also had the middle mouse fail.
It's ridiculous as its probably the best way to scroll big threads quickly and now it only works if I press it in really hard.
Can a mouse company not make a mouse where the scroll wheel actuates correctly?