A good, short dungeon crawl with a strong tie to another adventure (Forge of Fury) that makes that other adventure more interesting.
Requires some problem-solving from the players -- if they try to barrel through, it will go... poorly.
Makes good use of the new wacky kobolds from Volo's Guide (but it includes those statblocks, too).
Solid permanent magic item at the end that is nevertheless repulsive.
Can be an absolute murder-fest, depending on the DM and party composition.
"Da Door Sealer" is cool, but some guidance on what the kobolds do after it's triggered would've been useful.
Sik'garuk has the potential to one-shot the entire party in a single turn through no fault of their own, so... watch out for that.
Our party included a kobold bard with good interpersonal skills who disguised herself as a Sourscale and infiltrated the warren. This was kinda uncharted territory, as far as the adventure's concerned, but it's such a corner-case situation that I don't blame the author.