The Relay system is a traditional strap system. Nothing like Flow binders that I can think of. The big difference is the soft heelcup. You can literally squeeze it together. So it's supposed to give you more flexibility when in the air etc. Yet performs like a regular binding. I put a pair on my splitboard for backcountry riding. Not so much that I am doing spinny flippy tricks, but because the Relay Pros were nice and light. Less weight on the way up equals more turns going down. Performance wise, they are great. No issues with response and they are more comfortable than a binding with a rigid cup. Ground breaking? Not so sure, maybe the park rates will say more. It works fine and it is a quality binder.