Best: 31 Rue Cambon. I contacted an SA via whatsapp a few weeks before arriving to Paris. I knew exactly what I wanted. It was the last 19C Barbie pink CF M available in the whole of France. He said he couldn't hold for a month. Understandably. But, told me to send him a message 2 days before arriving into France. I sent him my flight itinerary. He had the bag on hold for me and although he was not working the day of my arrival into the store, another SA that we were linked to upon arrival, was nothing but amazing. She was obv French, but from a different country in Northern Africa. She WAS the best SA. So fashionable, straightforward without sounding pushy or hurried us. We were there for 2 hours looking at bags. She even allowed us to pay upfront minus the VAT, which was amazing. We left with 5 bags between the three of us. She even told us all the crazy stories of the ultra rich coming in and buying their entire staff J12 watches! IT was such a great expereince.
Worst: Hirshleifer. An SA guaranteed the first position to me on a very recent popular bag. I paid upfront the entire amount. She even sent me pictures of the bag from the stock room and asked I not share with anyone. Since she was not supposed to do that. I said ok. One day before the launch of this collection, she sends me an abrupt message saying the bag was canceled, avoided my phone calls and so when I called the store, the lady on the phone told me that I must have been ill informed and theirs no way I was in line for the bag. Then why charge my card? Anyways, I think they sold it to an uber VIP client, since it was the only bag in stock and not on order, and lied to me about it being defected. I ultimately found the bag through a reseller, for only $400 more than retail. But, I would never shop there again.