The apartment is pretty neat, but lacks one MAJOR component, AC that is; I would've given it a 5 star if the bedroom downstairs (basement) was air conditioned; the bedroom was, not only, steaming hot, it smelled as well "an AC would've taken the smell out, and provided comfort while asleep", the 4 of us had to sleep on the 2 couches upstairs with the windows open. By the way, the time I was in Paris, the temperature was in the mid-30s, with the exception of day 1.
The host, Jennifer, was great, very communicative, involved during our entire stay (4 nights) and she was very helpful.