Quite a quirky and charming place to stay. Make no mistake, it is a LOT of stairs. Even for myself and my friends, seasoned New Yorkers who walk up stairs a lot, this was a marathon. Thank goodness for Paul, who helped us with getting our bags up and back down when we left.
The apartment is tucked away in the back of the building so it's quiet, and the interior is very classically French. And right in the middle of the Marais so everything felt very walkable.
I would definitely recommend Parc Royal, but with the caveat of the stairs.