Search the forums, this came up recently and I'm sure whoever it was decided to buy, so you could get their opinion.
My own personal experience was positive: £30 for Roubaix long sleeve jersey AND bib tights delivered (from Ringwise 2009).
The sizing was decidedly Italian (tight on the thighs, biceps and forearms) and in a direct comparison (I also have the genuine article) you can see that the Chinese version is not of the same quality. They arrived more quickly than goods from the USA: less than three weeks (over Christmas)
You need a lot of patience to grab an auction bargain: they definitely bid-up their own items, so it's rare to get something for much less than the BIN.
Overall I think they are value for money and I'd buy again.