Good action, not much else.
The action scenes are good, but there's not much else to say. I didn't really find this film to be so SJW-leaning as most people claimed it was. There was some in there, including a line about checking privilege or something and another line about being white, but it wasn't nearly as overwhelming as I thought it would be. Hell, I even though that human/terminator hybrid woman was pretty kickass, and she was easily the best part of the movie.
Linda Hamilton, however, was boring, cliche, and useless. Walking away from explosions, stupid one-liners, always looking so unimpressed by everything. What happened to the legitimate badass hero we saw in T2? The one with depth and character? Now she's just some leather-clad stock action character who adds nothing to the story besides "hey, I remember her!" Arnold was the same way, but he at least had a little more watchability to his character. Not gonna lie, it's always a treat to see Arnold for me. He can be 94-years-old still shooting shit with a machine gun and I'd be fine.
The biggest problem for me is just how generic the film is. Boring story that fuses T3 with TG. That's it. James Cameron spends years disowning the sequels he had no part in...and for what? He literally does no better! This actually maybe my least favorite of the entire franchise, actually. I mean, none of the Terminator films are, like abysmal atrocities to cinema or anything, and neither is this, but at least the other movies actually did something with the characters. This one doesn't. Linda and Arnold are only back for fan service. Cut them out of the movie and nothing changes.
I'm not sure if this movie was some sort of cash grab or what. There's no way James Cameron sat around going "man, fuck those other garbage movies, THIS is the true sequel!" and he just copies exactly what the other movies did! C'mon, dude, what happened here? If he had directed this, it would feel very George Lucas-y with Episode 1. At least the action is good, because yes, it is really, really good. But the story sucks, so the movie sucks.