We had a very pleasant stay at Marie's place. We only met Marie once but we did meet her son Vincent. He was very nice and he gave us tips and made sure we had everything we needed. He even printed our boarding passes for us since we weren't able to do so (thanks again!). The place was very convenient, lots of metro stations around the area and nice cafes just outside the accommodation! It's around 15 mins away by foot from la marais which is a very nice area in paris. We were also able to walk to most of the sites but for the lazy ones you can always take the metro. The accommodation itself was small so as much as possible, try not to bring big luggages!