The team i used to manage has a bunch of them under riders now. I have been outfitting them with Quarq Cinqo units. From them the reviews are mixed. I've heard a lot of, "meh - it's nice." and "It'll work." not a lot of "OMFG it's the best bike I have ever ridden!"

One guy in particular is about 190 and a cat 3 sprinter. Really powerful and complains about the flexing. Another is much lighter and an awesome solo rider/break kind of guy and his response was that it was OK. He is coming from racing a Cervelo for years though....FWIW.