The sets, the sound effects and the acting are absolutely top notch. I can't say that the two rooms really integrate all that well as a story - I mean, they connect them, but it still kind of feels like "oh, look, two places we found in the Cité des Martyrs, go explore them". Le palais de l'horreur was my first legitimately scary escape room, one with a live actor. I absolutely loved the first part of le palais de l'horreur, such a creepy setting used to such great effect. The room overall had so many clever details that add to the effect throughout. I would say the puzzles are less of the main draw for either room (understandably so in le palais de l'horreur), but I really enjoyed my experience. I did this as a team of two, which I cannot say I recommend for your first horror room, but fortunately my cousin is far braver than I am. Also learned that "scaredy cat" does not translate into to french and instead you need to tell them that you are a "poule mouillée" to convey the same concept.
Particularly interesting or different
Yes
Physically active
Somewhat