I've had my powertap wheel rebuilt four times in two and a half years. I started with an open pro rim. First rebuild was to install stiffer spokes as the wheel was way too flexible and the spokes were coming loose. Second was because the rim cracked. The next OP rim had a rattly joint, which I just lived with. Third rebuild was because it had been retrued by myself so many times (like weekly) that it was just wasn't staying true and the rim was warped. The fourth rebuild was to get rid of the OP rim (the wheel was again requiring retruing too often) and put an IRD on.
All builds were done by good wheel builders. I weigh 141 lbs. The IRD wheel has required a couple minor trues but it's been fine since.