I have used it. In my experience I would still use a decent size bittering addition when FWH'ing. I have done FWH as the only 60 minute addition followed by a moderate size 45 addition followed by a ton of late hops. It was smooth ......... too smooth for my taste as it lacked the bitter punch you expect from an IPA.
Up next: Kolsch, Alpha Squirrel, Tripel rebrew, Witbier
Currently Fermenting: Charlie Sheen (barleywine)
Kegged: Tiger Blood IPA, Irish Red, Strict Observance Tripel
Bottled: Dry Stout, Pliny the ..... Squirrel?, Cream Ale