Oh my gosh- I literally just came back from the movie theater and well- this movie is not what you thought. Well, maybe not completely. The trailer exhibits it as probably another cheesy thriller movie, but actually the rooms were very well designed, we all love great filming and graphics, and there were plot twists- be warned, flashing lights in one part, and very intense and anxiety-causing/stressful, but it's called a thriller for a reason. Very well executed, great for a night out with friends. It gives you a jolt, alright, but I think you'll find it just as exciting as I did. Blood in some parts and some of the flashbacks may be "disturbing" but it's rated PG-13 for a reason- nothing more than blood/ violence though.
Edit- Yes, well, technically it may be "cheesy" or "already done" but it's more of a movie to just watch with your friends and give you a good jolt, even if it is "dumb" or however some would describe it.