It is good as a cheap and affordable place, in the middle of Paris, and suitable for a stay for couple of nights. However, beyond having to share a tiny room with 3 other people, there are issues with the quality of the stay. The house was not very clean, the mattress and pillow were of very poor quality, as was the rest of the furniture. The hot water would not work half the time.
However, meeting some nice people livened up the atmosphere.