In all fairness, we have not seen the first two, but after watching the trailers and reading reviews of the first two, they seemed to be the same.
We were glued to our seats waiting for something to happen and we are still waiting.
I don't want this to be a spoiler, but if you took all the good parts of the movie and put it into one reel, you would have enough material for a good Super Bowl ad.
If you have seen the first two.. save yourself some time. You've probably seen the third installment.