We were very glad we chose to stay at Marie's roomy, stylish, and well equipped apartment. It's superbly located in the 5th, near the old Roman arena and the botanical garden, as well as near rue Monge, a good shopping street. The Metro is close, and Notre Dame just a pleasant walk away.
If you want to practice your French, this is the place. Marie took the time to talk to us en francais, though her English is good too. She's a superb host whom it's a pleasure to remember.