Everything about this place is exceptional.
1) the appartment: the location is unbeatable, in the heart of st germain, between the water and Odeon. There are so many great restaurants and bar downstairs you don't need any sort of guide. It's the perfect place to start wondering by foot in Paris. Yiu make a right you are in the heart of st germain, you make a left it's the beautiful river seine bank and its parc.
The appartment in itself is georgius, charming, very well decorated and stocked. Beds and bedrooms are private (each on one side of the appartment) and the whole place feels like a georgous home immediately. Then the terrasse... pictures don't give it justice - having diner or coffee on that terrace hearing the jazz downstairs is priceless.
2/ The Host: Romain the host is wonderful as well. We use Airbnb a lot and having such a great host makes the world of a difference. He is reliable, responsive, communicates really well and extremely kind. He will go an extra mile to adapt to your plan and we were very greatful for that.
Overall, we use Airbnb a lot in Paris and if you hesitate between this appartment and another one I highly recommend you pick Romain's place. It is worth every penny (even every penny more than another similar place). It's a little gem that we are truly glad we found.