I am not going to lie, I thought this one was going to fall drastically short of saw 1 and 2, three was just O.K. But surprisingly it was better than all of them, with the exception of the original, which in my opinion has become a classic.
"Saw IV" has every ingredient of what a Saw film is supposed to have, and more. The story is great, not as in depth, due to it being the fourth installment, but it was still pretty good. They really went deep into what the Saw franchise is all about, which is what the fans want. They added some interesting camera features as well, including quick transactions between scenes, creating an awesome looking affect, it is difficult to explain, but you will enjoy it.
After the first three, I thought it was over, seeing as Jigsaw is deceased, but they really pulled it off well with the twists and turns, and replacing Jigsaw.
I highly recommend watching this film, it is definitely worth it.
10/10