We loved staying at this apartment! We were two adults & two kids (ages 10 & 13) from the US - spending one week in Paris for vacation. The location of the apartment is absolutely perfect for exploring the city. It is located across the street from the Seine River at Pont Neuf. When you step out of the apartment building, you can practically see Notre Dame cathedral to your right and you can see Pont Neuf to your left (and the Louvre on the other side of the river). Not to mention that the St. Germain des Pres neighborhood is lively and fun with tons of cafes, shopping, etc. We loved being able to walk to so many of the attractions and to enjoy walking along the Seine as well. The location is a 10 out of 10!
The apartment is one flight of stairs up, and there is a small elevator (we didn't use it - we just took the stairs). The bedroom sleeps two nicely with room for luggage and its own bathroom. The single room was small but perfect for my 13-year old son to have his own space and plenty of room for his luggage. My 10-year old slept on the pull-out sofa in the living room, which worked out great. There is a second bathroom off the main hallway. The apartment is on a very busy street right along the Seine River (so convenient!), but the apartment itself faces an inner courtyard and is SO quiet. The living room has big windows that overlook the courtyard, and the quiet was welcome after busy days exploring the city.
We loved having a small kitchen to brew coffee, keep some cold drinks and fresh fruit; we didn't do any cooking. Having two bathrooms was really convenient. The building felt really safe, with multiple codes, doors/locks to get into the unit. Checking in and out was really easy; the host was super responsive. The apartment has a lot of quirky charm - wood beams on the ceiling, a bright yellow small kitchen; we had everything we needed (clean towels, two sets of keys, etc.).
Hope you enjoy your stay there as much as we did!