Did the Davinci room with my cousins. Ultimately a set of fun puzzles, but I didn't feel like most of them were challenging. Each puzzle seemed reliant on a specific "unique view" of the problem that you needed to take and didn't really lend it self well to group efforts.
There was on puzzle that was related to time I thought pretty inventive, but the rest of it didn't feel like a good challenge, just an interesting edge-case problem.
Also, if they are going to do anything with blacklights, the ink needs to be strong enough. We spent easily 15/45 minutes not realizing something was available because it was so faint.