I think things can be a bit hit and miss, but generally if it's cheap, I'll take the risk.
I've bought some very cheap cycling shorts from there, and they were hopeless, they didn't feel the right shape, and wouldn't stay in the right places, but they were something like £2-99, so hardly a massive loss.
On the other hand, I've got a yellow fleece that I bought in there for around £10, and I've been wearing it for the last several years when cycling, and it's perfect. It's not a thick fleece, but I didn't want that, I wanted a lightweight fleece to wear over the top of a base layer when it's not quite warm enough for a base layer alone, and it's perfect for that. I also don't worry about totalling it in an accident, unlike say £200 worth of Berghaus fleece. (...and actually it did survive my last off, although was covered in blood until I washed it twice).