I've had 4 QAD HDX's and a QAD Hunter, never had any problems with either...decided I wanted to try something different, so I looked at limbdriver and trophy taker. I have a TT Smackdown FC on my CM and a TT Smackdown Pro on my Scepter V, still no complaints...seems like the TT are a little quieter than the QAD's I had...just my opinion