Pierre's place is in the ideal location. It's just North of the Marais, next to great restaurants and bars in the 11th, and a short walk to the Canal St. Martin. Two metro stations are very close (Place de la Republique and Filles du Calvaire). And a great boulangerie is two doors down the street.
The apartment itself is pretty much as shown in the pictures. There were no surprises. As noted by other guests, there is no air conditioning or fans. So it can get a bit warm on hot summer days. However, the large windows in the front and in the back do provide a nice cross breeze. Just keep in mind that, with the windows open, it can be a bit noisy. (It is city living, after all.)
We'd love to stay again and would recommend it for people who want a more genuine apartment experience (as opposed to a hotel experience). Thanks Pierre!