My husband and I were fortunate to stay at Isabelle's place in the Marais district. Isabelle is a great host and communicates with you often. She's also available by phone or email and quick to respond. When our flight was changed at the last minute Isabelle made the apartment available to us earlier than arranged.
Isabelle provides a welcome book that includes the house rules, as well as a number of favorite restaurants/shops and their locations. The Marais district is a great location so there are plenty of eateries near by. I got hooked on the avocado toast (platter) at the brasserie near the Arts et Metiers Metro stop.
Although the apartment is tiny, everything is clean and well appointed. We only ate breakfast at there and enjoyed street food and restaurants all over Paris. We grabbed some breakfast food at the local market on Temple and bread/croissants at the bakery recommended by Isabelle in the book. My husband was happy to find an easy-to-use drip coffee maker and I was grateful for a teapot and hair dryer.
There are 2 Metro stops within a 5 minute walk of the apartment. In addition, the Hotel de Ville and Tourist Info Center (on Rue de Rivoli) are only a 15 minute walk down Rue de Temple. FYI, we're 70 years old and had no problems walking all over Paris.
Lastly, we took a taxi from/to CDG airport. We paid about 70 Euros each way. You could take advantage of the train between CDG and Gare Nord at only 10.50 Euro each way, then ride the Metro to the Arts et Metiers stop.