I have had excellent experiences. I've ordered a lot from Yoox including many things I returned and the returns are easy. I ordered shoes from Shoescribe (the same company) and the package was stolen - refunded with no hassle.
But yeah, I really wish they had more info about each product. They completely remove any of the designer's description, eg, "J Brand Maria high-rise skinny" would show up as "J Brand denim pants" (they don't have J Brand, that was just the first name that occurred to me). So it's hard to stalk your favorite items from last season. And a lot of their clothing is Italian brands I'm not familiar with, so sizing is hard to guess.