This module provides plenty of character and tie ins with previous adventures, as well as sparking off a great deal of exploration in the nature of the fey. The combats are written to be interesting, and the setting and scenarios are extremelt interesting and theatric. Overall a really entertaining module with significant guidance on further adjusting encounters relative to your players (not necessarily the party).
I do have some questions and comments regarding some parts (Warning: Spoilers from here):
a) for the 2nd encounter, there are a few mobs which can appear (such as an ogre, one eyed shivers and redcaps etc) that don't seem to have a means of entering the boat house easily. They don't have significant mobility, and one eyed shivers porting in might seem weird giving the limited distance of misty step. Some further clarification on how the mobs arrive on the encounter might be good.
b) for the 3rd encounter, there could be more information on the reason why the PCs are fighting this encounter. I realized that only the player handout map details the motivation behind fighting it, and that its only briefly touched on if the players talk to the hags. There could be more elaboration on why the PCs are fighting this particular battle, and further details on how the animals are "guarding" the vortex.
c) The third encounter is a fun scenario, but there could be more motivation to approach the vortex. As it stands, the fight can be done entirely without approaching the 40ft radius.
But overall, this module sets up some cool moments that blend both fun and action, so these are minor points that a DM can adjust depending on their intentions.