The apartment is very cute, with many personal details. The pictures are very accurate. You'll be at the base of the hill where the Sacre Coeur is, and you'll be on a fairly busy little street. That means you've got plenty of eating options on your door-step and you're very close to a Metro station, but for light sleepers there is a bit of street noise (it didn't really bother me).

There are so many interesting neighbourhoods in Paris, each with their pro's and con's. A few local people described Montmartre as too touristy for them, and it's true to an extent. But its winding cobbled streets and good-quality boulangeries are definitely a plus.

You might need to be proactive in confirming details pre-arrival with Paulina - keys, security code. This was information I had to chase up.