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It took about 8.5 hours (I did all the side quests and collected all the items along the way). If you go strictly for main story you can probably finish it in under 3 hours.

Storyline was actually very good, almost surprising that the creators were able to make a serious emotionally invested story out of it.

As for the hype, completely depends on your type of gaming. If you like chill slow paced but short story games with lots of random fun things to do then this is definitely worth it.

Hey thanks for the explanation.
I think I will like it as I'm someone who likes storylines the most.