Overall a good movie, acting was not great to start with, mainly the girls but the did grow on me as the film went on. Nice mystery throughout but a little lacking in explanation, wasn't hard to understand what was going on but lacked depth.
I think this would have worked well as a series as could have filled out with professor family, then kids searching and so on. The last 20 mins you get another aspect which again could have been developed so much more, I kinda wanted the film to go on another hour to extend the end but could be another film altogether. Would have given 4 stars if the acting was better in the first 30mins.