I use the Rocket Sidewinders exclusively, and my father uses the Rocket Hammerheads exclusively...we find that if we do our job (get the arrow where it is supposed to be) then the heads do their job quite nicely.

Contrary to a prior post, we change blades probably 3-4 times per broadhead before we start over with new ones...the only thing I dont like is that they dont sell replacement tips (bone splitter screw in tips)