Jake I've caught plenty of flatties on them, having said that I think they'll hit pretty much anything that moves.
Camo has given me the best results so far, in the LCR they are unstoppable on the flat ones...
I've caught a couple of trevors on the new penny worms also.
I use about a 1/8th jighead- cast out, let it hit the bottom, couple of small twitches, pause, small flick and repeat.
EDIT: And of course, as with anything, tailor smash them.
Cheers
Tony