We loved our stay at Isabelle and Thierry's hotel.
My mother and I were only in town for four days, but found it to be just what we needed. It's located in the 5th, just a few minutes stoll from Les Gobelins metro and from the famous and divine Rue Mouffetard.
The hotel is well serviced everyday and is thus incredibly clean, while also being beautifully appointed - our room was entirely Art Nouveau, talk about the Parisian ideal.
All the staff were lovely and Isabelle was cheerful, obliging and provided us with wonderful local knowledge and gave us special tips on the best places to shop.
We would absolutely stay again!