Minecraft Dungeons Critic Reviews for PC - Metacritic (https://www.metacritic.com/game/pc/minecraft-dungeons/critic-reviews)
Minecraft Dungeons for Switch, PC, XB1, PS4 Reviews - OpenCritic (https://opencritic.com/game/9258/minecraft-dungeons)
Yeah only 3-4 hours is a shocker.
EDIT: sounds like end game is surprisingly good though, so reviewers who are taking their time more are being more positive. Also if you play on hard it can be a fair bit longer to get through the story. I think I will probably get this.