We had a great time in this place. Eric's apartment has a lot of character. It's vintage, cozy, clean and located in the heart of Paris. Let Marais is a very vibrant area with lots of cafes, restaurants, shops, bars etc. Very close to the apartment is a metro station which was very useful for us wanting to do lots of sightseeing.
The check-in was very flexible and since we had a late flight back, we could also leave the bags in the apartment during the day of check out, which we appreciated very much.
All recommendation (where to go, what so see, taxi numbers etc.) from Eric and Pierre who was handing over the keys to us were very, very useful.
It turned out that in the apartment was no hair dryer as it says on Web, however it was fixed almost immediately.
I would definitely go back there again.