Arnold kicked it out of the park. I loved him. He was funny and he was awesome. Emilia Clarke (Khaleesi) was a pretty good Sarah Conner. She was just like what you'd expect a girl in her situation to be. Jason Clarke as John Conner was OK. And Jai Courtney as Kyle Reese wasn't that bad like everyone made him out to be. He still had that bland look about him though, don't think he'll ever get rid of that. Lastly, J.K Simmons role was pretty good, albeit a bit too short.
The movie pays a huge homage/respect to the James Cameron Terminator movies (T1 and T2), especially part 1. Hell, some of the starting scenes were recreated shot for shot and it was great seeing that along with some bits and pieces that added to those scenes. Lots of fan service. This was the most humor filled Terminator movie so far. Many of it was timed pretty well and I really liked it. I gotta tell ya, those Arnold smile scenes, a homage to T2, really cracked me up. Also, I loved how they used that famous "Dudun dun dudun" soundtrack for cool Arnold scenes.
The problem was that the movie tried to overdo with the time travel plot. The beauty of the first two terminator films was that it kept the time travel aspect simple. Here, they did a lot more twists and turns and it got convoluted and messy. Also, the stupid marketing team SPOILED a lot of the movie in the trailers. Seriously lousy job there Paramount. Not that I liked that whole John Conner thing but still the shock value could have been cool. And the non-R rated rating had its downsides as well. Biggest for me was that the damage to Arnold looked lame without any detail to blood and skin like in the previous parts because they had to tone it down for PG-13.
The action, aside from a select few scenes, was pretty OK. I mean it was decent but there was nothing truly memorable in it. And I don't know where the used all the budget because many of the action sequences had sub-par CGI for today's standards.
All in all, I had a good enough time with this movie even with its flaws. I re-watched all the previous parts before this. And I would recommend everyone to watch Terminator 1 and 2 before watching this, just to refresh the memory. It is just sad for me that I wanted a future movie more. I'm one of those few who actually LIKED Salvation a lot. And I honestly wanted a sequel to it more than this. I wanna see the future stuff because this going back to the past and stopping SkyNet stuff has been done four times now, including this.