It's like the Saw series for me. The first one was fine. They should have stopped there, though. Conceptually, it wasn't deep enough to warrant so many different movies without feeling tired almost immediately.
they are getting old the 1st was really good and there was another 1 that was really good but can't remember which there is so many they just need to stop, I can't remember if it was the 2nd one that was way to predictable I didn't like it..
I like them. Strange thing is things like that have actually happened, soneone cheats death then like a week later (or even later that same day) they are killed a different way. Nerve wracking films in my opinion.