Pros:
Communication and check-in easy
Super cute and furnished nicely
In the Marais and great location to everything
Cons:
No air conditioning - if you can't tolerate heat during summer months may be difficult
Stairs - we were fine with them but it's on the top - if you have a lot of luggage will be hard but hey, you are in Europe!
The apartment may not be suitable for younger families - under 5 years old. We have a 6.5 and 3 year old. With young kids, we tried to keep it quiet but there were instances where we had difficulty - especially with the jet lag and gicen the central courtyard, sound travels - in which the neighbors will definitely let you know.