well i did get a chance to try out those new chassis sprung suspentions,the sprung roller hockey frames are pretty cool,i got a great rebound with each stride,the turning is tight,the transition from front to backward skateing was smooth due to the way the suspension is set up.the maneuverability with these frames are great,even the stopping was smooth.i could see these frames help make someone a better skater.as far as the durability of these frames well they seem pretty solid,time will tell,