We had a lovely stay at Diane's. It is in the heart of Le Marais with great food and easy access to transportation anywhere in the city! Could not recommend staying in this area enough.
Only notes were that the apartment was smaller than expected (great for 2 people, probably not for 4) and that the shower flooded preventing a longer shower than about 2-3 minutes - both taking into the account the price point.
Thank you again Diane for the helpful instructions and opening up your home for our Paris exploration.