Very nice studio, comfortable bed, strong shower. The location is great, especially if you like cats (the back window of the cat cafe next door - where the cats hang out) is next to the door of the apartment). Close Metro and easy access to Marais, walking distance from many Paris sites.
It was cool in Paris when we were there,
I'm not sure how comfortable sleeping would be on a very hot August night, since there is no cross-ventilation. Also, a stronger WIFI signal would help - as some reviews had noted, we needed to stand at the window or walk into the courtyard to get a good signal. Overall, a very nice apartment at a reasonable price, and the host was lovely and accommodating.