We enjoyed our stay. Nice and clean apartment. Near Gare du Nord and metro. Very close to the Sacre Coeur. Lots of restaurants and bars very close by. Very lively neighborhood. The pictures are accurate.

Although we didn't mind it, we thought it is only fair to mention the following. The apartment is very noisy. You can hear almost any sound any neighbor makes. So maybe not the best place for a light sleeper.
On multiple occasions on the streets around the apartment we where approached by dubious street vendors. Trying to sell us stolen iPhones and perfume (probably fake.. not sure)

We never met Yann, but the communication true email went very well.