My husband and I stayed at Juan's flat for 10 days and loved every minute of it. The flat was clean and organized and Rue Montergueil is an amazing and lively street. That being said, the flat is entered through a courtyard and that kept it amazingly quiet. Even on New year's eve, we didn't hear a thing! One thing to realize is that this is a very tiny (cozy!) place. I can see it being a great place for a single person to stay though we had no trouble staying there as a couple. It really depends on your intimacy comfort level. My husband mentioned that a guest approaching 6ft might be uncomfortable on the bed because their feet would touch the wall. If you're on the taller side, it's something to keep in mind. To sum it up, Juan's flat was a welcoming place to come back too after long days of exploring. We only used public transit one day because the flat is near an automated Metro stop, line 1. We walked every other day because of the strike but I'm glad we did. We saw quite a bit of the city that way. I would highly recommend Juan's flat. He is very easy to communicate with as well.