We had a great time in Paris staying at this lovely 3-bedroom apartment. Kudos to Gregory, who was very flexible on our check-in time as it kept changing due to traffic. He was very nice and welcoming and got us all set up in the apartment with everything we needed to know.
The location is excellent! It's one block from the Pompidou Center, and we walked to the Louvre, Notre Dame, and all around the Marais district. The location is also very convenient because it's a short walk to two different Metro lines, and a slightly longer walk (10 minutes) to the Chatelet metro, from which we went to Versailles and the airport.
The apartment has plenty of space, with a big living room/eating area, nice kitchen, and three good bedrooms. The only reason I'm not giving this 5 starts is the wi-fi: It works great in the living room area (300Mb/s), but doesn't work in the bedrooms (we tried with multiple devices - must be a signal problem). If you don't need wi-fi in your bedrooms, no worries, but with two teenage/young-adult children, this was an issue for us.
Overall, great apartment in a great location.