I run CB's Quattros. Just finished my first season on them. Relatively easy to get into. Nice float. I came from a MTBing background so these were second nature to use. Oh and I've never pulled out in a sprint or anything like that. The only thing I had to watch for the first months break in period was the cleats would loosen off about once every 2 weeks, but after a month i tightened them and they've stayed good the rest of the year.