Most of it is action. A lot of the movie is set in Zion, as the humans attempt to defend their city against the overwhelming hordes of sentinels. They fight good, but there's just too many baddies.
This one wasn't too cryptic. (I really liked the second one because it threw you some curves and made you think) It was pretty straight forward, with mostly just climactic scenes etc. The final fight between Neo and Smith was cool, albeit a little hard to follow because of the lightning storm, but had some pretty cool effects (they hit each other really hard and make a shockwave out of the rain; it then stops raining for a few seconds, then pours again

)
Edit: Fine. I was just posting it for people who would want to know the ending without seeing the movie.