I have a nearly full bag of Sub70 (lefty of course). Right now I'm gaming the 659CB irons 7-AW, 699V2 6 iron, JB Wedges in 52 & 58, 949X 5 Hybrid and the 949X 5 wood moves in and out based on the course. I have several other clubs from them that move in and out just depending how I feel.
Quite frankly, they are top notch, high quality clubs. Only change I made to my 659CB irons was rounding out the leading edge a little bit and I did a little grinding to the sole on my 58.