I ran this module tonight and there are some major issues. I will not be running this again without some major tweaking. Issue #1-Maw demons: They have so few hit points ( even maxed out) and have such a low "to hit" that they are almost worthless at Tier3. As written, I could not possibly hit two of the characters in my party, even on a 20. Issue #2- "Why are we doing this": You start deep in the center of Chult with no explanation how you got there, no real reason for you to continue, no declaration of reward. The "quest giver" is a young red dragon. I made her start talking instead of attacking because my party would have killed her by accident, unless I "DM fudged" her hit points. Issue #3-The "boss fight" was a balor that supposedly needed to be severely weakened before fighting. No legendary or lair actions. I ran it without weakening the balor at all. The party killed it in less than 2 actions per character. I did not allow even a short rest during the mission. It is not that tough for Tier 3. Issue #4-Quasits. Five Quasits in bat form were the extra defenders for a lieutenant. The frightening presence DC 10 saving throw could not be failed by 4 of the 6 players even if they rolled a 1. It was a party that was well rounded. Rogue,Wizard,Life Cleric,Warlock, Paladin,and Trickery cleric/Rogue. Issue#5-(Spoiler)- There is no way to save the dragon's wyrmling (dragon's child). My party talked for 10 minutes about different methods of bringing it back. They decided against the high cost methods because "I think we can just kill the dragon if she attacks us" (They were correct). They tried Divine Intervention but it failed. I did not say anything during those 10 minutes. All in all, this module should be rated mid tier 2. As a DM, you will need to make reasons for the story to make it work.