Our experience was okay, but there are quality hotels to stay in better locations for the same price. Strict check in times with fees if late (30 Euro for 8:10 pm?!) makes it difficult to come in in the evening at all via bus, plane, etc.
The neighborhood was slightly dodgy with large groups up people just hanging out, people sleeping on the streets outside in the mornings. The walk to the Louvre was about 25+ minutes plus.
Kitchen wasn't really equipped for 4 people. Walls incredibly thin, seems like its been converted.
If you're a family that wants to stay in one place, this could work, but not the greatest value.
It was very clean though; there were restaurants in the area and a grocery store (all closed around 9 pm). Hosts were very transparent and responsive.