Great place to stay and visit Paris. Chez Gustave is a great restaurant to eat and is just in front of the room. The place is comfortable, the bed is soft, water is good and services excelent. There are different metro stations in a walking distance, so it's nice for moving.
Just if you carry heavy bagagges it may get a little bit difficult to arrive from a metro station if you go walking, because it's in a small hill (but it's not fault of the hosts, who are awesome)