Best experience I’ve ever had with staying in someone’s apartment! The location is a dream. You can see Notre Dame out the fabulous flower-filled windows. Because it’s close to the Seine, the street flow and sounds are wonderful. (French accordion music wafted into the apartment late afternoons and evenings; really!)
The building is lovely. The apt is on the third floor; there's a lift/elevator the size of a closet but nice to have for suitcase transport. There are a gazillion restaurants in every direction. And the BigBus tour bus stop is half a block away if you want to do the tour/hop-off-on thing. There are terrific things (restaurants, cafes, bars, shops, parks) in every direction. And the grocery store is 4 short blocks away and there's an organic grocery one block away.
The bed was comfy; the sofa sleeper was fine for a sofa sleeper. The windows provided great breeze even on the few warm nights. The kitchen was great and had everything you need. The host and her assistant were wonderful and responsive, even giving me instructions about taking the metro to the apartment (3 easy metro stops within two blocks). It was the perfect Parisian apartment.