I stayed in Raphael's apartment with 3 other friends on a Paris girl's trip for 5 nights. We loved that we each had our own bedroom and that there was plenty of common area for us to hang out in with a huge comfy couch. Beds were also very comfortable and decor is cute and modern.
There's a few quirks here and there but no deal breakers. The apartment is located in a back building so there's several doors with different codes you need to use to come and go. There is also an interior courtyard but not a ton of natural light - we weren't there during the day much so that didn't bother us, plus it was nice having it darker so we could sleep in a bit. Area is very quiet at night so no noise problems either. The neighborhood itself is awesome, it's super local and not touristy. Great market just a few steps away in Place D'Aligre that goes on every day, with antiques, clothing, and also lots of fresh food and flowers. It was also very easy to get around with Gare de Lyon just about a 7 minute walk away.
Overall we really enjoyed the apartment and I would definitely book again!