Two of us stayed at Diana's apartment in the beginning of June. Located on the 6th floor (no elevator), the place was small, but comfortable enough for both of us. Everything except the toilet was located in one room; toilet was located out in the hallway. Having the washer/dryer was super convenient. Diana was super helpful in helping us getting situated and answering any questions we have.
The location is perfect to explore Paris. The Louvre is a short 5 minutes away and a subway entrance is just 2 blocks away. There are many restaurants around, all within walking distance. We had so much fun exploring Paris sometimes we forgot to reserve enough energy to climb the 6 flights of stairs.
Overall, if you just need a place to sleep and wash up while exploring Paris, this is a great place.