I bought a set from e-Hungfu Bikes. It was a 50mm carbon clincher. I've put about 1,000 miles on it so far. The carbon rims are great, however everything else was terrible. It was out of true and little to no grease around the open bearings which caused lots of problems as the miles went on. I even had a spoke bust on this new wheelset. Additionally I purchased a hub upgrade which turned out to be grabage as well. I wasted an additional $300 fixing crap that should have been done right in the first place. Hopefully some of the other Chinese dealers can do a better job.
Aero wheels are fun to ride and look fantastic. If I had to do it all over again I would spend a little more money to get a better quality wheelset.