I didn't care for it. It had its moments, but it was TERRIBLY edited (partly to make it PG-13, partly for no apparent reason at all). I liked all the references to the previous movies, but they made me want to watch the original films INSTEAD of finishing the one I was watching. My full review is on my WordPress.

SPOILERS (not present in my full review):

So Marcus is a cyborg, a Terminator body with a human brain and heart. And why does Skynet need this? If they already started production on the T-800 which is designed for infiltration, what reason would they have for keeping Marcus' free will, which allows him to escape and save John? And if they're so effective, why not do this to all of the prisoners instead of continuing with the T-800 who all look the same (that we've seen).
I didn't see John being upset during his "WE ARE ALL DEAD!" speech because the Resistance was being inhuman, but because John didn't want his dad to die before John could be conceived. As low on the totem pole as John seemed in 2018, I think the Resistance would have been fine without him existing.
Where did Kyle learn his survival techniques, being one of the only humans in LA and a toddler during Judgment Day. Who raised him? Questions, questions.
Where are my fields covered in skulls? Every time we see the future, we see fields of skulls! I didn't see any skulls in this movie, let alone fields of them!
On the big Arnold reveal towards the end, most of my theater laughed in disbelief. I thought the effect was well done, but still cheesy. Don't they make any other models of T-800?

But seriously, I blame everything on McG. Of the two prequel/sequel/reboots this summer (a genre that didn't exist last year), Star Trek wins by actually being an enjoyable movie. TS has just too many pacing, editing, and creative problems.

EDIT: I just figured out what it was like! A bad fan-edit! Bad transitions, obviously missing sequences... It's like McG fan-edited his own movie!