Ok - for a two hour adventure, this was loads of fun.
Players can expand if they want around the carnival, or you can be more straight-forward towards the plot, and it's easily done. One of the most malleable modules around, easily expandable and compressed.
DMs also have fun with this due to lair actions, although some of the damage may outright kill LVL 1's, so do adjust the encounter appropriately. Works well with PC's that you know their background well, as it gives a good chance to RP on their fears and traumas - as the boss would.
[5 of 5 Stars!]