If I could give the location for this space 6 stars I would.
This was our first time staying in Paris and I truly believe staying in such a wonderful apartment, with it's incredible views, fantastically central location and unique feel is a large part of what made our stay a magical, once in a lifetime experience.
All communications before our arrival was easy and prompt. The owner's son was there when we arrived and helped up up the stairs and showed us around the apartment.
The view is incredible. You'll see swans and boats on the river. You'll hear the bells of Notre Dame. You'll see lovers walking along the Seine. You can relax by the window after a long day of sightseeing and still be right in the heart of Paris. So so much better than a small hotel room somewhere. Maybe more expensive, but if you want a great experience it's worth every penny.
There was plenty of room. The interior design style is eclectic and wonderful. We had no problems and no need to contact the host during our visit. There were ample towels, they had provided coffee and tea - and a bottle of Champagne! There were plenty of basic amenities such a dishwasher pods, toilet paper, trash bags, sugar, oil, spices etc....
I counted 87 steps to the top. Not a problem for us and we knew it going in. But you should know it in case you have knee issues or anything.
The bed was comfy and firm. The electric mill toilets were new to me. We didn't really use them - relying on the good old regular flush. There were only three in our group - 2 adults and our son, so it was easy enough. The shower has good water pressure and there are some soaps and shampoos if you forget yours. We left behind some antibiotic ointment (my son scratched his finger while sight seeing). There were a lot of small amenities like that left by previous travelers. The wifi was fast and reliable. They had a USB charging station setup. We didn't use the TV, Playstation or DVD player but they have those things - along with board games and books.
Overall it was a very well appointed place to stay. If I won the lottery I would move to Ile Saint Louis. We loved it. Just absolutely loved it.