Could have been better but good movie! (spoilers)
The diarrhea scene was just hilarious, the sounds that were made and Steph just creepily watching her taking a dump, I laughed so hard.
The ending could have been better. One of two things would have made this a lot more satisfying. Show her reaching civilization or as she conquers her fears and starts to swim across the lake and the camera pans out have a speed boat come from nowhere and runs her over. Blood fills the water. Then zoom in on the guy driving the speed boat, Ohhhh its the thumbs up guy doing what he does best. Thumbs up! But that's just me. I love ironic endings.