In the early days I think they had problems by design. Now days I think the problems arise when people push the envelope. When people start shooting them a low poundage and with low kenetic energy is when problems develope. I would bet that just about everyone that's had problems did so when shooting them when they should have stuck to cut on contact heads. Poorly tuned bows will also cause problems. Just asking the question.... "who had problems" is pretty much useless without knowing the specifics of poundage, K.E., distances etc. Me, I just don't like them but that'sa personnal thing. Never shot them. I see no need to fix something that isn't broken.