If you want to stay in a cooler part of Paris, away from the tourists, yet accessible to everywhere, this is a perfect place to stay. Maguy is a charming, nice host who welcome you warmly, helps you with any questions, prepares a nice French breakfast, and makes sure your accommodations are cozy.
It's a few blocks from the Rue des Boulets or Charron metro stops (both on the 9 line). But since you're in the Bastille area, you simply have to check it out as well. Great stores and shops, wonderful atmosphere. There are a few great cheap/free jazz clubs there that I went to (Cafe de la Plage and Les Genies). Take a walk down Rue de Charrone, heading toward Le Marais, and stop and look at everything.
I really enjoyed my stay -- nice bed and bathroom, and off you go for wonderful days and nights in this great city.