My son and grandson (aged 4) stayed in Benoît's apartment for 3 days (travelling from Manchester UK) -and had a really super time. The apartment was cosy and well maintained, and had everything they needed. It is in a very good location - a quiet, little street which is close to all the attractions in Montmartre, and not very far away from everything else you might want to see in Paris (a convenient metro station 5 minutes aways). There are lots of pleasant shops, cafés and restaurants in the immediate vicinity.
Benoît was extremely helpful and welcoming, and I'm sure that he will provide you with any advice you need if you are new to the city.
My son and grandson are looking forward to staying there again.