We are a family of 5. (17,16,12) and this was our first trip to Paris. We stayed 5 days and thought the apartment was perfect for us. The bathroom was small and yes there were 5 flights of stairs to climb. But it's Paris, and the climb was nothing even with bags. The kids all enjoyed the upstairs loft. There is a nice view from the front room window and everything in the apartment worked fine. It was clean, comfortable and functional. We had no trouble with the wifi.
The location was awesome! Easy walking distance to the Louvre and
Notre Dame. Metro station across the street and RER station just 5 min walk. Bakerys, pasteries, markets, brasseries, all an easy walk from the front door.
Valerie was very prompt with emails and good with directions (we took the RER and walked to the apartment) We found everthing that she said about the apartment to be accurate and we had no surprises. I would definitely stay at this flat again. I'm not sure we could have found a better place for our first visit to Paris.