A fantastic place to stay - close to public transportation, many places to eat, tourist attractions (the Eiffel Tower is about a fifteen minute walk), and the supermarket. Note that there is no elevator so be prepared to take the stairs, but it is worth it. The functional kitchen comes in handy when you just want to stay in for the night.
Maria is a great host and has a lot of great recommendations! We wish we could have stayed longer than four nights.