I have these mounted on a pair of 178 RMU Diams with T1s. I mainly ski park, however, I do ski the entire mountain and like to ski eye tearingly fast. These bindings are amazing for skiing any terrain needing an active, responsive binding. Coming from a pair of Cobra R8s, the increase in performance is immediate, and has allowed me to greatly increase my level of skiing. I will not be going to any other binding.