From one of those reviews:
Hello im sorry you are having an issue with your wheels. I think it is unlikely that there was an issue with the build tension because it would be impossible to achieve 0.2mm runout if the wheels were not tight enough. Its impossible to comment without seeing them in person, so I suggest if you haven’t returned them please do.
Because crest rims are ultralight I recommend not to just crank up the tension. They can fail if massively overtensioned, and need to be built with the correct tools.
We do offer on all our wheels a free truing service at any time in the future, and crash replacement prices if they are beyond repair.
Our wheels are built by experienced wheelbuilders who have built well into the thousands (actually probably tens of thousands come to think of it) of wheels. We use the best quality sapim nipples and spokes, very expensive and accurate wheel jigs to produce extremely reliable wheels. We have built over 500 pairs of stans wheels for this offer with much less than 1% issues reported.
If you do have an issue and have not contacted us I suggest this as the first course of action as we are waiting to help if you ever have a problem.
I think I remember Fruit/neil/octo teaching himself the wheelbuilding initially. My mates SS wheels have a very low spoke tension and it wont be long before they need some spoke key attention.