I stayed at Sebastièn's for 3 days with my mum and my sister (over 20), and I would highly recommend it! The flat is lovely and neat, both the bed and the sofa-bed are comfortable for 2 people, and is very close to the metro station Gambetta (2mins on foot). The neighbourhood is quite and rich in markets, boulangerie, and pubs. Sebastièn is a really kind and thoughtful host. I'd like to get back there asap!