I did use https://great-voyage-inc.myshopify.com/ for an S17 Pro power Supply repair (APW9) recently
They are legit. Getting a repair is kind of confusing. You create a repair request on their site and send in. Then email for confirmation. I also joined their telegram chat for more immediate questions.

I was however very disappointed in price. Half of it went dead, that is 2 of the 3 fans (as powered by one cord) stopped. Expected it to simply be an integrated fuse, but they of course did not say. They never advised of estimate to repair (I failed to ask ahead of time, too exited I finally found someone that would repair power supplies) and they only said done, total due $250 ($200 repair and $50 return shipping. It only cost me $14 to ship to them the via my UPS account.) However, as you can't find one for less than $350 now and days, I had to take it.

I may give them another chance for a hashboard repair as my regular company is 90 days out and they turned the power supply in about 3 weeks. Telegram chat suggests they are similarly fast on hashboards. But I will ask for price quote before repair