A strong module let down by unoriginality: Raiders of the Twilight Marsh is a direct sequel to DDEX1-7 Drums In The Marsh, featuring a return to the Twilight Marsh and its lizardfolk, and finally (maybe) delivering a confrontation with the black dragon Throstulgrael, teased in the earlier adventure.
Let's start with the strong: Everything once the players actually get to the dungeon is entertaining. Beserker kobolds, a half-dragon troll, and Throstulgrael himself all stand out as memberable encounters, and the pacing throughout all of this is solid.
Unfortunately, as with many early Adventurer's League modules, it wastes time getting there. The trip through the swamp is dull and long, unwilling to invest greatly in any setpiece (presumably because of the demands of Adventurer's League timing) but equally unwilling to just cut to the chase. Worse, everything in this portion is stuff that the players have already done in Adventurer's League, and done better. The swamp voyage is less entertaining than the one in Drums in the Marsh. The lizardfolk are a repetition of lizardfolk in both Drums and the immediately-prior Pyramid of Sorcerer's Isle. The hags feel bland and generic after Tales Trees Tell's Jenny Greenteeth.
With all that said, it's still in the better half of Season 1 modules. DMs running this are advised to handwave as much of the early nonsense as possible and get to the dungeon with haste.
[3 of 5 Stars!]