The place was wonderful. It is very spacious and in a good location. You are a bit far from the flagship tourist sites but the added seclusion is nice to come back to after all the hustle and bustle of the day. That being said, you can still get to all the fun sites easily via the metro and there are a good amount of shops and restaurants near by. There are a couple of small grocery stores neaby with one being down the street. Moulon Rouge and Sacre Couer are both within walking distance. Gare du Nord is a 20 min walk but there are metro lines and a bus that will get you there as well.
Muriel was a great host too. My sister came at the last minute for one night and Muriel was able to accommodate her on short notice. I would definitely recommend this place for a long stay in Paris.