My experience:

Ordered 3 motherboards, 3 ram, and 3 server PSUs. Motherboards and ram were flawless. Installation was insanely easy. Literal plug and play save for a few bios modifications.

However - server PSUs have been nothing short of a nightmare. First PSU flashed a bright white on startup and didn't turn on again. Second PSU worked and I managed to mine equihash on HiveOS. But then I heard a loud SNAP, and found the PSU dead smelling of burnt plastic and hot to the touch. Tried the third PSU after, but it never even turned on. There is nothing abnormal about my house and I already had two rigs going.

Customer support has been nothing short of outstanding though and I have heard nothing but good things about Octominer. I think they just have a bad batch of Server PSUs that are either manufactured cheaply or have poor quality control. That would explain how their price is so low. Will be looking to get a refund for all of mine.