We highly recommend Johanna's apartment for a lovely stay in Paris.
First of all - location-location-location. It's perfectly located in the heart of the Marais, very close to bars, restaurants, shops, but also close to the Pompidu Centre, Notre Dame, and other monuments.
The apartment was sparkling clean, and had all we needed, including an air condition! (a rarity in Paris). The shower was perfect too!
The communication was very easy, and Johanna responded very quickly to our questions.
All in all - highly recommended for a perfect stay at the Marais.