Our family of three adults were very happy with Flo & Jm's apartment!
It is perfectly located in Montmartre just outside the main touristy spot around Sacre Coeur, but very easy to get there in a 5-10 minute walk up the hill, or just around the corner to the funicular railway. Just walk down the hill to loads of restaurants, where locals hang out, not so many tourists! Also an easy walk down to the Moulin Rouge.
Just be aware if you use Abbesses metro station (3 mins walk), use the lift to the the exit (it's a long way up by the stairs!)
The apartment itself is much more spacious than others I have stayed in in Paris, and is very very quiet - you would never know you were in such a busy area. My husband and I found the bed very comfortable (it is very firm but that's what we like) and our adult son was happy on the double sofa bed.
It is very well equipped - although we ate out for every meal so didn't use the kitchen.
Flo is lovely. She met us there, showed us everything in the apartment, and even gave us a bottle of wine. A lovely touch!
Cannot fault this place!