I started bowhunting in 1985, the Thunderheads were "THE" heads back then and stayed that way for many years until mechanicals took over. I used them off and on myself for nearly 2 decades. The only complaint that I had with them is "every now and then" if you messed up and dead centered a tree OR a balljoint on a shoulder, sometimes the scew in tip would break off! With todays bow and xbow speeds I'd be leery of such breakoffs and thats why I insist on one piece heads or at least something without a screw in head. (Back in the 80s I also used NAPs "Razorbacks" which had the same screw in tip as the T-heads and they also were prone to breakage if you hit the right, HARD target!)