While the room itself was clean (and the small size which is expected for this price range), the room smelled of mold. Even after opening a window for a while, the wet smell of the room prevailed.
If you need a room just for the night (as Paris is great, and you just need a place to put your head), then this is a cheap, not so horrible option, But if you plan to stay in the room awake for a while, I personally suggest a different hotel.
The reception was polite and very nice. The facilities are just as described in the reservation page. Note that there is no lift (wasn't a problem for me with a small luggage, but may be if you intend to arrive with a large suitcase).
Will not stay again because of the smell.