We (couple) stayed one night at La Mondaine and thought it was great. As with many Parisian hotels, the rooms are small, but they were well laid out and comfortable. The hotel is beautifully decorated and has a really cool history. There were many restaurant options around, a 3 minute walk to the metro station, and a 10 minute walk to the Moulin Rouge. Additionally, they allowed us to store our bags after checkout, as our train was later in the day - very kind. We would definitely stay here next time we visit Paris.