Dominique's place is very good value being spacious (for Paris) and cheap (for Paris). The bathroom, in particular is a good size. The whole place is clean and fresh. The neighbourhood is scruffy but we never felt unsafe.
Only one negative, which I am surprised no one else mentioned in the reviews I read. The studio is above the railway lines leading into and out of Gare de Nord, the biggest railway station in Europe. Between 5 am and midnight there is a train going past every few minutes. This did not bother me, but it was a couple of nights before my husband got used to it.