I've actually ordered Chloe wedges from you-shoes. The shoes are authentic but they got my order wrong (sent the wrong color) and never responded to my emails! I ended up just keeping the wrong color but I'll never order from them again. Pretty bad CS imo. I believe they are in France.
I ordered these in green patent and they sent black...not the end of the world I guess. They didn't respond to any of my emails and I would have called them but my French is rusty!
If they are the only option for your shoes then take a chance. I say I will never order from them again, but if they had my HG shoes and were my only option I probably would break down and use them again. HTH!