If you're looking for a super cute and spacious flat in Paris, I highly recommend this Airbnb! The Ledru-Rollin (line 8) metro station is less than two minutes from the door and the Bastille metro station is just about 5 minutes. There are TONS of cafes in the area (including a crepe and panini spot that is even closer than the metro line!) and the Seine is about a fifteen minute walk away.
As far as the flat itself: the view is unparalleled. There are huge windows in the flat which provide tons of natural light and a gorgeous view of the Parisian skyline. You're on the 7th floor, which means you won't have anyone hindering your view or peeking in your windows. There is an elevator, which is extremely convenient! The airbnb has a little kitchen, dishwasher, washing machine, and refrigerator as well as plates/dishes. I seriously loved this spot and it was such a gem of a find!