First of - I must say we enjoyed our stay but there are a few things one should be aware before booking the apartment.
I'll start with the good things:
The location is *amazing* - right in the Monmartre, 5 minutes from the Sacre Cour. The area is very lively, especially on the weekends. There are countless restaurants and bars, boulangeries, patisseries etc all around.
The apartment itself is just what we needed as a couple + teenager. There are 2 bedrooms with a double bed (I guess queen size) and each room has a shower/bath attached but no toilet. There is one toilet, off the living room.
The kitchen is small but has everything you might need. We used it daily for breakfast, sandwiches and even a couple of dinners.
The living room has on couch and a table with 5 or 6 chairs where you can sit down to eat.
There is also a washing machine/dryer which was very useful. We traveled with only carry ons to avoid the mayhem at the airports, so we needed to do laundry.
There are 2 supermarkets and a few more grocery stores within walking distance.
Now the not so good -
We had the misfortune of arriving on one of the hottest day in the history of Paris (40 degrees Celsius - 104 Fahrenheit), and it was hot inside. Although it says the apartment is air conditioned, that was not what I expected. Due to strict conservation laws they are not allowed to install A/C units, so there were only coolers in the apartment which helped relieve the heat, but if the weather wouldn't have cooled during the night, it would have been unbearable.
The second thing is the location - the Monmartre is uphill. You have to climb up the street or up the stairs if you return on foot or by public transportation. One bus line drops you at the corner, but it doesn't go anywhere interesting and we never used it. Taxis and Ubers drop you off at the entrance.
If you have trouble walking, it could be bad choice for you.
All in all, I would defiantly recommend this place for a vacation in Paris.
Marina the host is super nice and reachable if necessary.