I ordered a set of 36H Mavic EX721s with Hadley hubs and am very happy with them. They are a perfectly built set of wheels. I was skeptical about ordering online, but I can say that these wheels exceeded my expectations. Having had the chance to ride on them for a few weeks now, they have held true and I expect them to last for a long time. The ceramic bearings in the Hadley hubs spin forever. Customer service was great, and the wheels were packaged exceptionally well. Although it did take about 3 weeks from the date I ordered to the date I received my wheels, they were worth the wait, especially considering the great price I paid for them. I would definitely do business with prowheelbuilder again!