I've played with it a little bit now and I have zero complaints. Not seeing any problems or deal breaks, and it definitely doesn't feel fragile at all.
I made a thread ages ago about using this for SC4 and then I remembered it only has 2 shoulder buttons, so I definately won't be using it for SC4 but for SF4 definately going to pick one up soon. Hate sticks an even though my 360 pad does justice with SC4 I have a feeling it won't have the snappiness needed for SF4 like this pad would give.
Oh shoot, I'll probably pick one of these up if my Best Buy has them. That'll be for 360 since my local gaming center only has 360's to play on. I have a 360 stick, but can play pad too. Now that I have a solid pad to use, I won't object so much to playing fighters over there.