The two things an escape room needs to be memorable are a beginning that hooks you right away and an ending that leaves you in awe of what you just accomplished. This room has both. It turns out that everything between the beginning and the ending is also great. The level of craft and engineering that went into the set and the props is incredible. There are at least two elements of this room that I have never seen done in an escape room and I think I am unlikely ever to see them done anywhere else. This is simply a must-play.
Particularly interesting or different
Yes
The story makes the most sense if you have already played the rest of Sherlocked’s rooms (including The Lost Cabinet) but I think it would be fine on its own too. I am sure that the gamemaster tailors the intro based on how much game-world knowledge the players already have.
We played with 2 although the minimum is listed as 3 (we cleared this with the venue in advance). I think 3-4 would be fine. More than 4 and a particular section of the room would be very crowded.
There are some breakable things (none of which are meant to be broken).
No live actor in the usual escape room sense, but the game master is a character and will interact with you before, during, and after the game.
Physically active
Somewhat
Climbing up and down stairs and ladders. No crawling.
Accessibility
Parts of the room would be impossible to get to for a wheelchair user. I use a cane and was able to get everywhere with some help.
Easy in the sense that there is a parking deck, but it is expensive and driving in Amsterdam is fraught. The location is very close to the central transit station, and the transit in Amsterdam is efficient.