I just got back from the midnight premiere of it. And right now I'm weighing whether or not I should take the time to write a full review of the movie.
So far as I'm concerned the Terminator story ended with Terminator 2: Judgment Day: one of the most perfect sequel movies of all time. Neither of the last two alleged installments have added anything of merit to the saga. Terminator 3: Rise of the Machines was pretty bad and Terminator Salvation stinks on ice. Just about everything about it is wrong, with the exception of Anton Yelchin as the young Kyle Reese and he's channeling Michael Biehn from the original The Terminator about as well as Karl Urban did DeForrest Kelley in Star Trek.
And speaking of Star Trek: if you haven't seen it yet and were planning on catching Terminator Salvation this weekend, buy a ticket for Star Trek instead. Even if it's your second or third time going to watch it.
Terminator Salvation is everything that is wrong with modern blockbusters: all about special effects to carry the story, instead of complementing the story. And a lot of it makes no sense in the context of established Terminator mythology.
Like I said, in my mind the Terminator saga was concluded with Terminator 2. I had no empathy for the characters in Terminator 3 and I care even less for them in Terminator Salvation. Absent James Cameron coming back to direct a new Terminator film, I shall never plunk down good money to see another one again.
Hell, Batman & Robin and 2008's Godzilla might have been better than Terminator Salvation, if that tells you anything...