What's your 1P stick going to be?
The Supers aren't bad, but they aren't a replacement for a good trigger stick either.
You'll need more than one fire button for games like Sarge though.
The Supers aren't that bad for Robotron, in that the corners aren't nearly as prominent as on the Competitions and Ultimates; but, again, they aren't a replacement for a good set of Wico leafswitch sticks either.
All-in-all they are a decent compromise, but aren't really GOOD at anything I can think of.