The Mavic Open Pro has probably won more Cat1/2 races in the last 10 years than all other rims combined.

I know several people who train on them exclusively, one of which is a current state champ in the Masters RR and Crit, and his teammate, who was the Masters nats silver medalist in the TT this year.

The teammate I bought my PT/OP wheel from is a 21y/o, 170lb 380w FTP/1500w+ 5s monster, and it only had to be trued a wee bit when he prepped it to give it to me, after a year of abuse by him.

In a year of use by me, I haven't had to true it yet, although I am significantly smaller than my teammate. It served as both my training wheel and race wheel, and put up with 13,000+ miles of training and racing, and probably about that much by my friend before I recieved it.