Probably the best of the trilogy. The opening is fun, even though I've had trouble getting players willing to try trebucheting themselves. The number of options in the middle allows the DM to set up the best encounters for the party or give the players some agency into what they actually run into, giving players some replayability if they try it again with another character. The final encounter is fun and should be a very hard fight for the characters. It's definitely difficult to run in just two hours; if you've got a larger block of time I'd suggest running three middle encounters before continuing on.
[5 of 5 Stars!]