We stayed at Sabastien's place for one week. Sebastien met us personally and told us everything we needed to know about the flat, district and Paris. He was very helpful and nice.
The flat is bright and cozy you can have all you need, but the best part of it is balcony with the great view on Eiffel Tower and other sights. Looks fantastic especially at night. Besides Sebastien has a great collection of art books and films so if you decide to spend an evening home won't get bored. The neighborhood is fine as well. You have supermarket just in the next building, there is also a pharmacy and braisserie where you can buy fresh croissants in the morning and have a coffee on the balcony. (They are lovely). There are several subways stations nearby, the closest is Cadet, it's 5 minutes walking down street. The pace itself is a good starting point to start your journey in Paris.