The location is really nice. There are three metro stations all within a few minutes walk, and Rue Montorgueil is a great place to stroll and take in Parisian life. As previously written by other guests, it is a quiet flat but please consider the area. There are a lot of restaurants around and below the flat, and Parisian's are out late. The area is well known to me, so I didn't care, but other people might think it's sudden quiet at 9PM.
The flat itself is decent. If you like soft foam mattresses, the beds and the pull out couch should be suitable. Hopefully the host has replaced the chairs to the kitchen table, as the seats are splintering. The kitchen is good enough to put together meals, eat take away and certainly to have breakfast in the morning. Bonus, there's a Nespresso machine (though no pods)!
Overall, I would likely stay again because the area is nice and central, and the flat is spacious and generally comfortable.