Thunderheads are some real good broadheads witha good reputation, I never had any issues with the breaking or anything I was just unable to get any type of pass through with them. The I went to the 4 blade muzzy's, havent had an arrow stick in a deer yet, sail all the way through...,but in my opinion i would choose the Thunderhead over the Spitfires any day. Theres not many heads out there I havent tried. Ive tried most on the market from $2.00-$65.00