I stayed here for over a month. Wonderful launch pad for life in Paris! The location is simply unbeatable. You are a 5-minute walk to Gare de l'Est, 10 minutes to Gare du Nord. And 1 minute to Canal St. Martin, a wonderful area with restaurants, cafes, and shops. Many days I did not really stray beyond the neighborhood because I had everything I needed.
The space itself is a studio, you have a decent-sized bed, a nice bathroom, and a kitchen that is a bit raised above the rest of the living room/bed area. There is a fireplace and mantel. I locked my bike in the parking lot. I found the room very quiet and good for sleeping. Communication with the host was fantastic - she answered all of my questions very promptly.