Surprisingly good!
I was skeptical but the movie was well done. Overall, the plot, performances and production values were good to great.
SPOILERS:
I wondered at one point whether the passengers had no hope of surviving but I figured they would because they'd each been given specific problems. The twist was a great turn on the problem of their problems.
In general the twist was great. You suspect ghost or zombie stuff bc the filmmakers want you to and its a nice surprise in the end.
I also really liked the final scene with the witchy woman.
I don't understand the low score. For a B horror movie this is great.