We had a great time staying at Leopold's place recently. Very convenient to a couple different metro / RER lines. There are a lot of great places just steps away from the apartment -- patisserie, fromagerie, boulongerie, etc. The communication went well as our plane trip got us in early and we were able to check in earlier than expected (and drop off our bags). There's definitely a university-vibe around the neighborhood at night -- but with the bedrooms at the back of the flat it did not keep us up at night. I would definitely recommend stay at Leopold's place.