We were 3 girls staying in Benoît's flat for 3 nights. The location couldn't be better! It's in a fantastic neighbourhood, on a quiet street but literally a few steps away from many many cafe's, boulangeries, patisseries, bars etc. It's a stones throw from a couple of different metro lines so it made navigating Paris very easy.
It's also walking distance from the Sacre Coeur with fabulous views over Paris - (go up for sunset)
Well, you can see all this from the map :)

The flat itself is TINY! But this wasn't a problem as we didn't spend much time in it anyway except to sleep and shower, as we ate out in the many nice places around the neighbourhood, one of which was recommended by Benoîit (Le Jardin d'en Face -lovely and homely atmosphere with classic French food). The flat would be fine for a couple, and 3 people with only a small baggage, but for 4 people or larger luggage it would really be a squeeze. The bed and sofa bed were very comfortable. The shower head is better than the one photographed and had good pressure and hot water!

Benoît wasn't there to welcome us as I think he just rents his flat while he's away but he gave us very detailed instructions on how to get to the apartment and find the key and his communication with us was great.
All in all, I would recommend a stay at Benoît's flat!