Gripflex is one of the best lines I've ever climbed on. Nice grip and knotability. Double cored so it maintains roundness. Runs great through every multicender I have tried with it. Just retired my 7 year old hank last month. As for bounce...it's not something I have ever paid attention to in a rope. I'm 220lbs geared up so majority of the time the tree is bouncing along with me.