I have used Gas, ABB, and Threadz. Settled on Threadz due to being able to just throw on a pair with little to no adjustment. ABB were a huge dissapointment. Wore through the serving around the cam within a few hundred shots. Gas strings served me fairly well. Just had to twist up the cables quite a bit. Threadz went on and timed out perfectly. Didn't have to touch the cables, hit spot on at 70 lbs as well. Timing was still spot on after 150 shots. Their turn around is extremely fast as well, they ship the same day. That being said, I would like to try Buck Slayer. Trail Kreitzer said you never have to worry about the peep turning on you when you draw back. I have mostly minimized this with the Threadz with Gillingham's half hitch system. However there is still some rotation. I have been able to control it fairly well by simply turning the D loop to match up with the peep.