I have stayed in many Airbnbs, and I rank this as one of the best. The location was great. The apartment itself was great. It was clean, tidy, well equipped, comfortable. The bedroom was exceptionally comfortable.
A few hiccups: we had difficulties at first in contacting the host, but that got solved rather quickly. The wifi is weak, and this is something the owners may want to look into. We could not even open Face Book, for instance. We could send emails, at times watch Youtube, but that's about it. This forced us to go to a cafe to do some work, which, to be honest, was not a big deal: sitting in a cafe in Paris, sipping coffee and eating too many croissants was not a problem. :)
Well done.