I really am not sure that there was a need for the Saw franchise to return. The movies are literally carbon copies of each other. If you like the idea of seeing people get out of the traps - cool. If you don't - then these movies are garbage. This is pretty much more of the same. No sort of reinvention. Just another copy of the whole "story". I'm not saying that it was bad. It really depends on if you like these kinds of movies.
I would recommend anyone who liked the other Saw movies to watch this one. You will most likely enjoy it. Otherwise - stay far, far away like you did with the others.