There are a couple guys on the boards here that run the mega blowers and make near 900hp on 509ci. Their cats run 108 and 115. I'd say that's worth something! Teague also uses them on the 740 package. Lots of those running around out there as well. Not saying there aren't better blowers around but the B&M certainly have been proven to be useful in some applications. I also know guys with the smaller 250 blowers that give a nice boost to milder engine setups.
-brian