Bea's flat is in a very central location. 15 to 20 minute walking access to the Eiffel Tower, the Louvre, museums, and Notre Dame.
A couple things to note if you are considering staying here. The bed is very high, and could be an issue for anyone with mobility issues. And the door locks like Fort Knox, if you have arthritis or weak hands the door will most certainly be a struggle for you.
Overall a nice stay, with a restaurant and pharmacy across the street and a supermarket and bakery just around the corner.