Cafe Au L.
Google
This place is a gem!
We came in twice in a day, first do check the selection of stainless steel pans, but we had to run some other errands first, and then we came back to purchase.
It was a Saturday, sure, the store is pretty busy, but at both times we were met with friendly and knowledgable staff out on the floor, who did their best to help us with our needs. Yes, Bonjour when you meet and speaking French certainly helps, but they were helping people in English as well.
We ended up with several items, including a stainless steel Mauviel 1830 pan which is listed at 214€ on Mauviel's website, but we paid 166€ at the store, so we cannot even complain on the prices.
I've lived in Paris for over a year, I've been to several kitchen supply stores, this is my favourite so far. We are definitely coming back.
PS I talked to the staff about having several staff out on the floor, and they mentioned they have a huge problem with people stealing products. I can certainly appreciate the staff keeping a watchful eye on clients in the store.