Pretty good.

The characters and story is good, and (from what I can tell, anyway) the depiction of psychosis is realistic and grounded.

Additionally, it's depiction of Norse mythology is quite unique. Showing a much more haunting depiction that stands out from its contemporaries.

It does, however, have a lot of problems. For one, its combat and puzzles are fairly repetitive. Additionally, the story takes a few hours to pick up.

Fortunately, the experience is pretty short, so the repetition isn't super overbearing.