I've used it on 5 american style ales so far, most hop forward, one malt forward, and not sure about any of them. It's fast and clean, but I'm not sold. It seems to leave behind a one dimensional, somewhat flat flavored beer. I don't mind waiting for beer with more complexity - Wyeast 1450 for example.
That said, I'll use it again, I'm sure, especially with SMaSH ales.