We were looking for a place for four adults in Montmartre. We found Jeans apartment and stayed three nights. The beds were comfortable, the apartment had various equipment and was about ten minutes away from the next metro station. We also found a supermarket and a very good restaurant nearby.
The only major issue we had was that we found black mold above the main entrance door. Because we were exploring Paris most of the time, it didn't bother us that much. Nevertheless it needs to be cleaned so I informed Jean.