We had a great time when staying at Vincent's place. The neighborhood (and Paris) was amazing. The apartment itself was rather small, but it was clean, had a pullout couch and a working bathroom which is all we needed. If you prefer being out and about most of the time when you travel and want a decent place to crash that is conveniently located, this is the perfect spot.
One thing we will say is that we got the impression that some of the photos in the listing implied there was a view from the apartment which is not the case. We probably still would have picked it even if we knew there wasn't because of the price/location, but it was a bit disappointing to discover that the only thing you can see out of the window is the corner wall of the interior courtyard.
One other recommendation for this apartment - Vincent kindly provides a video and detailed instructions on how to access the apartment. We highly recommend viewing this video and reading the instructions thoroughly BEFORE you arrive as our phone service was very slow in Paris and we couldn't get the video to load. Other than that, we had a great time exploring the neighborhood and found the apartment to be a good value.