A very lovely tiny apartment in a nice part of town away from the noise and surrounded by parks. Very close to the metro to get around, and there's good food about.
The apartment itself is quite small, but has a nice kitchen with an oven, range, and dishwasher. The bathroom is quite nice with a relatively large shower and comfortable arrangement. The bed folds out from the wall and is pretty comfortable but could get a bit problematic if you have a lot of luggage, since you'd need to move things around. Lots of things are provided though! Yoga mats, a darling nice old guitar (be careful with it), a speaker, and a nice little patio area to sit give you some comfort when you're in the apartment. It's well furnished and adorably functional. The neighbors are also very nice.
There's a loft for storage too, and you could sleep a third person up there if they like a stiffer sleeping arrangement. You'd be on a futon mat on wood boards so it definitely isn't for people with joint problems, but might be good for your back overall.
Arnaud was an excellent host and made sure we were taken care of and was exceptional in communicating with us. There were three of us, so it was a bit of a squeeze, but turned out to be a good size for our stay of only a few nights. I think the apartment would be perfect for two. He actually bought new towels for us to use, though we didn't need them.