My kids did the Puzzle Pirates room and had such a great time! My 5.5yo was able to be pretty involved, though she did eventually decide she just wanted to play pretend with all of the pirate stuff. But my 8yo was committed and had a blast. It was challenging for him but not overly so. Their great-grandmother went in with them as encouragement, and that was helpful in keeping the kids on task.
We really appreciated that the employees were flexible and didn't hold the kids to a one-hour timer. (I'm sure they can't do that if they have more guests coming, but we were there on a weekday and it wasn't busy.)
While the kids were in their room, 4 of us adults did the Rocky Mountain Zephyr room and it was super fun! Just challenging enough, and the theming was beautiful.