I don't think I'll ever use anything but them again and I've shot Magnus, Zwickey, G5's, Steelforce and a bunch of others.
Why? They're as bomb proof as any head I've used, they will not tip bend, they will not break on you. The blades are ultra super sharp - you never have to worry about what sharpness your heads are.
Yes, they're not cut on impact, but take that tip, and using a nice diamond stone you can get it ultra needle sharp in no time, and that along with the ultra sharp factory blades is better than many resharpendable heads that people use saying they're "sharp" when they're a long ways from it.
I bought up some 160 gr 3 blades and using a KME resharpen the blades. Here is a buck I shot with a 700 gr arrow/head and 125 gr Thunderhead this past fall - the arrow blew through him high rib shot, coming out low on the opposite side, arrow laying on the ground where I hit him, head didn't show any signs of being used to be honest.
Also a comparison in a 125 gr head vs a 160