Koro's apartment is a gem. The neighborhood gives you a feel for the real Paris outside of the tourist attractions. Everything you need is within a couple of blocks and the tourist attractions are a quick metro ride away. As we were visiting during the transportation strike, we were also able to walk many places and take taxis for a reasonable price.
The apartment itself is great for a family, with the main bedroom upstairs and two beds downstairs with a toilet as well. The whole apartment is a great blend of old charm and modern convenience. You can sleep really well there-the beds are comfortable and it is surprisingly quiet for being in the middle of the city. The kitchen is well stocked for cooking meals if you like. There are also a lot of delicious and reasonably priced restaurants in the neighborhood.
Koro was a very responsive, friendly, and kind host. My husband and I both got sick during the trip and she was helpful and understanding of our situation. I hope we have the chance to stay again.