Sadek's place is awesome! It is literally in the dead center of Paris and all of the classic museums and attractions are within walking distance. While my wife and I were there we only had to ride the metro once otherwise, we were on foot because everything was so close. The neighborhood is great with lots of great restaurants, bars, and shops nearby. Walking around in the day or at night you feel safe and welcome.
Saeks place is small so if you are planning on bringing lots of luggage this might not be the right place for you. Both my wife and I just came with carryon backpacks and we were more than comfortable. The place was very clean and for such a small place it is very well laid out.
The next time we are in Paris this will be the first place I check to see if it is availble.