We were visiting friends that live around the corner from Yann's place. We could walk to the Roland Garros grounds. Yann is a very nice guy and will walk you through all the information you need (in English). He left some breakfast stuff and fresh fruit for us, nice! The place is big enough for two. It is being lived in when not rented out. Bed is comfy but not very wide. Kitchen has all utilities. Only downside was the half broken toilet but with Yann's instruction it worked most of the time. He will have it fixed days after we left. And the coffee machine was broken and did not work but you can get some coffee at the cafe downstairs.
All and all a fine place to stay for your Paris visit. Although I think the price could be a bit less. We payed 100eur a night which is too much in my opinion.