Some users have reported a few problems with the Mad Catz line of Street Fighter controllers.

There's a list of issues players have had with the Tournament Edition stick on Shoryuken.com, and another thread about the standard FightStick here.

Just to keep this in perspective here, people are reporting stuff as minor as the buttons being slightly scratched, and others state they're having absolutely no problems at all.

But the most common problem seems to be the standard FightStick 'sticking' a little bit when you let go and it returns to a neutral position.

Several SRK members are posting detailed accounts and fixes to these issues — but also remember Mad Catz is offering a 90 day warranty — so if you run into big time problems you can always ship it back. And again, most people who picked up these controllers say they're very happy with them, so it seems like the percentage of people running into trouble is small.