The location of this apartment is Amazing! We had read all the great reviews before we booked the place, but, being unfamiliar with the layout of Paris, we still weren't prepared for what a great location this is. It is directly on the Rue de Rivoli, which is right next to the Sein River (just across the Tullieries gardens), and the apartment is right next to the Louvre. And the Metro line is literally about 100 feet from the apartment. There are tons of restaurants and shops in the streets below the apartment.
And I can't say enough good things about Olimpia and Patrik (her freind who was there to check out out and help us get our taxi on the last morning). Olimpia always answered my text messages and calls promptly, and she showed us the view from her apartment (just across the hallway from the rented apartment) both when we first got there and then again at night. The view from her apartment is amazing and you are literally looking at the Tullieries gardens, the Louvre, and the Eiffel Tower.
The apartment itself if very comfortable. At first it seemed small based on American standards, but as we got settled in, we realized that it was plenty big enough for us. There is a comfortable bed, sufficient closet space, a nice bathroom, and a small kitchenette. Although we didn't cook any real meals, the kitchenette was great for keeping drinks cold, making coffee and tea (supplied by Olimpia) and making breakfast (usually bagettes and cheese/ham etc. from the corner store, just a block away. Olimpia also provides a hair dryer and an iron and ironing board, so you don't need to bring those.