People do have problems with them. Check out the Amazon.com reviews. Only a handful of people though really. Oh and Mad Catz has addressed the problems with the joy stick and those who have problems with them are asked to call them directly.
My recommendation if you get it is to mod it. Swap out the joystick, with a
"Sanwa JLF-TP-8YT-SK Ball Handle Joystick, 4 & 8-Way Adjustable"
You don't HAVE to swap out the buttons, but I would swap them out. If you decide to swap out the buttons, they're only $2.95 each
(Sanwa OBSF-30 Pushbutton)
Also, if anyone is selling a SE stick, TE stick, or fight pad, I'm looking for one as well!
Oh and one last edit, the mods are super easy but they do void your warranty. Buy the Sanwa parts are very reliable anyways. Check out all the vids on youtube for modding help.