My daughter (age 12) loved our stay at Olivier's loft! It is incredibly charming and the beds are SO comfortable! There are blackout curtains when you have jet lag, and big sun-filled windows when you don't. It's both cozy and spacious. Yes, it's a three floor walk-up, but as someone who has lived in Paris and NYC, this is par for the course. In return for your efforts, you get to stay on the magical Ile Saint Louis which is in my opinion unbeatable. You are right in the center of Paris, but with the benefit of being on the small island. There is very little car traffic so it has a small village feel to it, with it's own little grocers and bakeries, multiple pharmacies, a florist, cafes and restaurants (including Michelin stars!), and of course, world famous Berthillon ice cream; the many stone bridges that connect the island to the rest of Paris have ridiculously stunning views of the city and a revolving collection of talented street musicians.