This small apartment is exactly what its described as. We really enjoyed staying here and it was very comfortable. This was our first AirBnB so were extremely nervous about doing it but it couldn't have gone better. Our train from Barcelona broke down (literally) and we didn't show up until after midnight but Vincent was there with a smile on his face...I was really upset we made him stay up! Then when we left it was at 5 am (ugh) but again he was there and very nice about the whole thing despite our atrocious hours.
If I had to nitpick I will say these things: the shower temperature tended to fluctuate....but you are in an old Paris building, what do you expect you silly tourist? It was fine, just be aware of it.
The only other thing is there is no air conditioner. Again, dumb tourist complaint. I only point it out because we happened to be in Paris when they were having a crazy heat wave, in the 90's (f) every day. BUT there are a lot of windows you can open at night that let the mercifully cool air in, then shut them in the morning when you leave. If the weather is 'normal' this will NOT be an issue for you.
On a plus side, there is the stated washer and dryer (separate machines) which was a god send due to all our clothes being dirty due to the heatwave.
I was really sad to leave the city, having this nice comfortable place to stay made it just that much better.
Stay here if you can, Vincent is a wonderful host and the location is very nice.