Being directly atop a train station, Leo's place is excellent for anyone planning to get around Paris by means of Metro Ticket. There is a lot of construction happening nearby, but during my stay the noise was confined to daylight hours. (The trains run all night but are virtually silent.)
Leo keeps the bathroom and living room very clean, and I caution that you will be expected to do the same. This means you'll need to wipe the counter down each time and also squeegee about 8 square feet of glass after each shower. It's definitely more work than typically asked of a guest but it only adds up to an extra five minutes each day.
Leo's spoken English isn't very good but her written check in instructions were very easy to understand. Plus she's always patient if you need to look up how to ask about something in French if need be. I recommend asking anything really detailed via text message though, since the computer translators make everything so easy.
Last comments I have are that the view of the Eiffel tower is through the living room, but you are free to sit there basically whenever. (The view from the bedroom isn't too shabby either. ) Also, it's a fairly modern building with a solid HVAC system that kept me plenty warm without having to fuss with a space heater or extra blankets.