This is a solid adventure with no ethically challenging bits, nothing to stop you from going full murder-hobo. The bad guys here makes no bones about being bad. Or well, they do make bones but they are tiny elven infant bones and that rather reinforces the whole bag guy thing. Despite the fact that it's a pretty straightforward good guys have to stop bad guys thing, the story is actually pretty rich with the weight of a history between bugbears and elves behind it.
The bad guys, especially the high damage dealing bugbears are pretty nasty. True to the moniker, I think there's a real possibility for some TPKs. My only issue is a bit of a lack of diversity. The PCs will fight Goblins, Goblin Marauders, Goblin Archers, and Goblin Dogs with a lot of frequency. Worgs, too. Each bugbear captain is different and there are a few other beasties and traps but it's mostly hunting down little greenskins. It's forgivable since it's a goblinoid themed adventure but I could still wish for some additional types of goblins that could employ different tactics or maybe some caged and enraged monster they could point at the PCs.
Full stat blocks and other necessary information is available to run this game in Pathfinder or 5e and I didn't notice any obvious errors due to the translation between systems.
[5 of 5 Stars!]