An exciting module that has a bit of everything for everyone.
My players had trouble suspending their disbelief for the barrel launching, but eventually went along with it anyway so as to keep the game moving, as none of them wanted to sneak.
The monkeys seem... a bit off-the-wall.
The beholders were less fun than I thought they'd be.
The bridge encounter was hard to do, as my players did not want to risk crossing together but were afraid of staying back. A lot of arguing happened =/
The aarakocra town feels a bit rushed.
The final dungeon makes it hard to give clues without immediately giving it away.
The last encounter was sufficiently epic.
All-in-all, needs a good deal of work from the DM to put some flesh on its bones, but it has good bones.