Cozy but great! The place was somewhat small but I instantly loved it. I stayed for a full month and it literally had everything I needed. The studio is well organised. When I arrived Daman even left some coffee/tea and some other basics so I could get myself sorted and just enjoy my stay. Everything was super clean and the building was nice as well. The neighbourhood has everything: pubs, supermarkets, metro station, etc, all not more than 5min walking, the Sacre Coeur is about a nice ~15min walk. Daman also would check on me every now and then to make sure I was okay. On check-in and check-out he made sure I got the exact indications to arrive to my destination without any problem. He would even reply for day to day inquiries.
I can't recommend it enough. I would 100% go back to the studio whenever I'm in Paris!