Wow. That's a great way to sum up our stay at this property. We were a family of 5, with 3 teenagers. The apartment had enough room to accommodate all of us and our belongings. There are some reviews here that comment on the stairs. It is a walkup for sure. We traveled light, so it was no big deal for us.
The apartment has been updated with nice new windows, so even when there is hustle and bustle outside, you're well insulated in the apartment. And the location! My word! Sooooooo many places to eat and so much to see that's within walking distance. We are a nutty bunch, so we did a ton of walking. We made it to the Louvre twice, and the Notre Dame area quite a bit all on foot. There is super easy access to the Metro stations, and even an RER station that is just past Notre Dame.
Checkin and communication were superb. It was a very easy process. I am wholly satisfied with our trip, and our decision to stay at this flat. It's cozy, but you can make it work for sure! Paris is awesome!