They're fine to race with. Problems with them are:

- not that cheap. $650 for a disc, not that far off Renn, Flo, PlanetX plus the 2nd hand market. I picked my Zipp disc for $700 had been used twice.
- issues with warranty, it will need to be sent to China
- shipping, in general, from China is very, very slow. It took a month for my wheelset to arrive, it was damaged in transit, had to be shipped back, which took 5 weeks, 1 week for it to be inspected, another 5 weeks of shipping. So it took over 3 months
- hard to sell 2nd hand. I could probably sell my Zipp disc for what I paid for it, you will be lucky to sell Chinese wheels period.

I'm not anti Chinese bike stuff, but it's not worth the cost and hassle. There are a few Chinese companies like LightBicycle that now have factories in the US which would make the warranty/shipping issue not a problem.

I have had two different pairs. A 60 mm and now a 90 mm both where great no issues have compared them to top brands I have rode before and there is no difference.

Have had 200 lbs athletes on the 60 mm no issues rides fine. other athletes I know have done the same no one has reported a problem ever.

The prices for them are starting to climb though.

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