Pluses: great location, comfortable bed, big TV, not expensive stay, great host, fantastic view
Minuses: the kitchen area is there but you won't use it during your stay because the smell coming from the pipes won't let you do that (toilet and the shower are in the same room as the kitchen).
The street noise is very loud and if it's hot and you want to leave the window open, you may have trouble sleeping.
It's important to know that there is a small corridor and you bedroom is on one side of the corridor and the kitchen+bathroom is on the other side of the corridor (two separate rooms), but they are just for you to use.
Overall I think I would stay there again, but it's very important that you stay there alone, I would never decide to stay there with my partner.
Sofiane is a very nice person, he also was very flexible with my check-in (thank you!)
PS. It would be great to have a simple moka pot/espresso maker in the studio!