Amazing game, lots of other people have gone into detail about exactly why that is so I don't have to! One thing I will specifically praise though is the mystery crafting- I liked that there was a good balance of things I could guess through observation/deduction + things that had to be "revealed" to me. A lot of mysteries struggle to walk the line between obtuse and obvious but this nailed the balance.

And even though the main story gets wrapped up in a neat bow at the end, I liked that (this is too vague to be a spoiler really) the exact natures of a few of the phenomena/characters were left somewhat ambiguous. Another hallmark of a good mystery is knowing when to stop answering questions and leave it to the imagination!