Its not scary. Rarely a "makes you jump" moment, and you never have the feeling of desperation, and fear of death, because all dying does it cost you a percentage of your money.
I recently platinumed it, took quite some time, so yeah, it is worth the $20. Especially if you are a completionist. Tons of content and different things to do. It can be glitchy, but when it works, its straight forward fun.