I just finished it! I enjoyed it. As others have said it does have a Stephen King flair to it (Seth is kind of like Randall Flagg). I liked getting to know the characters in some depth because it made me care more about the outcome.
One thing I noticed was that this was a low tech book. Aside from Brant's laptop. There was no searching for "Eloise" online or trying to contact help by cell phone.
I was also of the same mind on cremating Seth. His ashes would then be placed in a very small urn which would then be encased on concrete and thrown into either a volcano or the ocean (whichever was handiest).