This is a magnificent place with one of the most beautiful views of Paris. The apartment is in the best area you can stay although is in the middle of the 18th district which is very touristy, it doesn't feel crowded because the street is quiet and beautiful, yet if you walk 3 min you have great streets with different options for food and drinks where French people hang.
Sophie is the perfect host, it feels like you are staying at your friends place.
If you stay here, the chances of you having an excellent time like I did are very high. Just to wake up or go to bed with the view of the whole of Paris at your feet is one of the best experiences you'll remember form your trip. The photos here are short from how incredible, peaceful and impressive Sophie's place is.
You won't regret, it's worth every penny.