We had a great stay in Paris at Yanns apartment. We did have an initial problem on arrival but it was totally out of Yanns control and he rectified it immediately. Phillipe who helped us when we arrived was lovely and the apartment was clean in no time.

Pros:
The location is AMAZING, right near the metro and a few good bars and 2 mins walk from the Sacre Coeur which was one of my favourite sights, especially at night!
The apartment is the perfect size with everything you need.
It was clean, the bed was really comfortable and shower is great.

Cons:
As it was July it was quite warm in the apartment but it was 30°+ so couldn't be helped.
It was also quite noisy at times, people shouting, children screaming, doors slamming but this was because we had the windows open due to the heat.
The apartment is on the 4th floor which was fine for us but might not be for some people.

Overall a great apartment in a great location. Would recommend it and would stay there again.