It had potential (spoilers)
I thought the first 30 minutes of the movie were actually quite good, up until the moment the girls died. The stone thingy was cheesy as hell; the story was inconsistent; no plot (after the first 30 minutes); I felt like they were in a rush to tell the story, instead of focusing on adding some layers to the characters. This could've been an amazing movie, if only they put a little more effort in it. I get that the genre is horror (sort of?), and like I said, the beginning looked promising, but it kinda went downhill soon after.
On a side note, did anyone else root for Maddy and Tracy, instead of Maddy and Leena?