See it. In theaters.
There really is no middle ground. It will either freak you out, or you'll think it's dumb. But if you see it, see it in the theater. Get the full crowd effect. Don't wait for the DVD.
Walking out of the theater, there were girls crying. The person sitting next to me thought it was overhyped. It got to me. I had to sit and collect myself for a little while. Just sitting there like... wow. Wow.
Just don't believe what that person said about the sound. Yeah, the loud, sudden startles contribute, especially to the climax of the picture. But to me, it was just the creepiness of something terrible that you know nothing about, that just escalates as the plot moves on. Even the last few, most terrifying seconds (imo) aren't about the inital startle-fuck, but the creepy cuddling after. lol There are some truly frightening moments that just linger.