All discussion must start and end with the location: if you love the Marais (and you should) this is smack dab in the beating heart of it. Yet it's on the opposite side of the courtyard so it's silent at night.
The space itself is amazing in its economy. It is quite small (as are most places in Paris) but intelligent design makes it huge. Nothing cheap or disfunctional finds its way into the place. Loved it all.