Our stay at Ben's apartment was a pleasant experience even though we didn't stay very much indoor, because we visited lots of places and came back late every day. The neighborhood is nice and you are just at 10min. walk from Sacré-Cœur. The metro station is also really close.
The apartment was as described on the website (so no surprises there) and the host was very kind and kept us updated with all the details. We gladly recommend this apartment for any tourist visiting Paris.