We arrived at 10 pm on a saturday (everything was closed) and we expected at least a bottle of water, but there was nothing to drink. Also, the place wasn't clean at all, the sofa-bed was uncomfortable and noisy (and the blankets were way too old and used).
The place is overall too small for three people (even though it looked a little bit bigger on the pics).
It's an ok place for the location (10-minute walk from Musée d'Orsay), but wouldn't come back for its value.