I have not used them. I tried to once but they got super complicated and wanted me to fax a copy of my passport and a copy of my bankstatement so I just cancelled order. I believe they do authetic things though all though I guess I can't be sure since I havent bought anything there.
I ordered a baby paddy from them at the beginning of last year. It was described as grey with silver hardware and the picture showed a very pale grey- so I assumed it was the SS07 nuage, but when it arrived it was galette- very similar to nuage, but from the previous year, so i sent it back. But it was genuine, and the return was very straight forward. Other than the fact that their stock was a year behind (!!!) I would recommend them.