The brad nailer right?  I own the 2″ and like it, not tons of use as of yet.  All the professional trim carps I know all use the pc brad nailers, mostly the 1 5/8″ model.  Most of those carp’s nailers are well used and they still have them so I would say they like them best.  Down time for them is money so if they had problems with it them they would hold on to them.  I seen some good info about the bostitch brad nailer too, but no personal info about them.