The switch hubs are decent, Novatec units I think. Standard bearings seem fairly poor, at least, none of the ones I know of have lasted very well, but that’s easily sorted. I don’t think they’re far inferior to a Pro 2 despite the price difference.
Fruit doesn’t like it when I mention this but while most of the SS wheels I’ve seen have been really well built, a couple have been rubbish- uneven tension and visible wobble from new. Then combine that with the possibility that Legendary Superstar Customer Service will occur. But the parts are such good value, that I’d still consider them- price of a proper rebuild would still leave them cheaper than the competition, and if you get a good one then that’s even more of a bargain.