This place has perfect location, just a few steps from amazing Sacré Coeur. The flat and the building itself has typical "montmartian" feeling and the whole surrounding is very lively and vibrant. Flat was clean and well equipped - we had everything we needed. Also the communication with Kristell was easygoing and with no problems. We really enjoyed our stay and definitely can recommend it.
Just small tip at the end, use the location and visit Sacré Coeur very early at the morning. It's magical when there are no people inside except a small group of locals doing a worship. Totally worth it ;-).