Cyril's apartment made us feel like Parisians - it's super comfortable yet has loads of personality. The kitchen/sitting room area is a great place to unwind with a bottle of wine after tiring yourself out in the city. And the location is superb. We were able to not only walk to the Louvre, Arc de Triomphe, Eiffel Tower and Montmartre (which was a highlight) but along routes with interesting sites along the way. And the streets closest to the apartment are safe but vibrant - the neighborhood is loaded with sidewalk cafes/restaurants and has plenty of patisseries and specialty shops as well.
So as long as you're okay with six flights of steps (we were happy for the extra exercise), we highly recommend Cyril's apartment.