The Visit is an odd little horror film about two siblings (15 and 12) who go to spend a week with their grandparents who they've never met before. Quickly disturbing and creepy things begin happening, which are attributed to the grandparents' advanced age. The behaviors escalate and become terrifying.
The movie consists of footage the kids are taking from various cameras documenting their experience, and this becomes very annoying. The kids themselves are a little annoying. And the premise -- that their mom hasn't been in contact with her parents for 15 years and still won't communicate with them -- becomes too implausible.