Jenn/Me: The movie was pretty darned good (until the last 30 seconds - literally) and made good use of suspense and misdirection. However, that last 30 seconds ruined the rest of the movie for me. Thus, I am pretending it doesn't exist.
Jenn/Me: It went from a decent and plausible* somewhat happy ending to a "Oooo... what if she made a mistake and did choose wrong?" ambiguous ending. Pick a damn ending. One or the other. The first one was acceptable. The second one was even acceptable but not both.
*plausible as in that whole suspension of disbelief and the supernatural is real kind of plausible.