It's very easy - RENT THIS APARTMENT. Great location, close to the marais area, Bastille, lots of metro stations and walkable to half of the city (we barely used the metro).
The bed is great, I had no trouble sleeping there. The AC is great too and completely configurable with a timer, sleep mode, etc. there's a fridge and a fully equipped kitchen. Great view from the balconies AND to top all that - on Thursday and Sunday there's a huge market at street level (zero noise in the apt, don't worry) so we bought fresh fruit, veggies, bread and cheese and made a superb breakfast with those. Charles and his nephew Sadi are really nice. We didn't need their help too much but when we did (like holding out luggage at their apartment the day we left, so we can enjoy a full day in Paris) they helped with a huge smile. By the way, take a "Discover Tours" tour when you're there! We found out about them in the last day and took two tours which were amazing! (You pay as much as you want, the guide are paid via tips, we gave them 11 euro each).
Sadi, Charles, Thank you!
Oded and Mary