Just got done with this last night with the lights turned off again in the dark and got another thriller. I love it, just keep em coming. if you liked the 1st, 2nd, 3rd, you will like this one as well. The little kid was amazing and so was that main teen age girl. Great production and execution.
Each one to me stand on it's own and they somehow managed to expand the series without cheapening it anyway like the Saw series for example. If they can keep this up, I'll def look forward to the 5th one.