I've been to France several times and this proved to be the best location I've stayed when in Paris. It was also a very pleasant stay thanks to the hospitality and kindness extended by Sophie & Stephane who even accommodated a very early check in on a Saturday morning (during protests) to help me get settled after a 24 hour trip. Very flexible and happy to help. The apartment is very modern, neat, clean, nicely decorated and in a secure building. The balcony is also nice and having things such as a smart TV which streamed Netflix from my phone made for some relaxing times when you want a break from sight seeing. The linen is clean, plenty of crockery and essentially well set up in every way to help you have a good stay. I was there for 15 nights and I didn't feel cramped or uncomfortable, of course most apartments are not big in Paris but the layout and clever use of space really helps you feel like you've got plenty of space.
The immediate area provided easily the best meals I had in Paris and I'm not one for going to tourist places if I can avoid it. There's a great cafe right opposite, a supermarket, ATMs down stairs and 2 minute walk from an AMAZING truffle restaurant (Maison de la Truffe). 5 minute walk to the famous Galleries Layfayette & a metro 150m from the door.
Stephane continued to keep in touch, offered assistance and to even come and clean the apartment given I was there for 2 weeks. Check out and in was easy and I'd highly recommend this stay to anyone.