Horizon Zero Dawn is a good game in that it is pretty, has an interesting world, and has good combat mechanics, but it is open-world in the worst way possible. It has hundreds of meaningless side quests, the rewards for which are literally just loot boxes of crafting components (often times just containing more loot boxes). Also the voice acting for most NPCs is inexcusably bad and breaks immersion, but that's a minor gripe.

If you play Horizon, I honestly recommend sticking close to the main story and making a b-line for the end. It is a hugely bloated game.