Terminator Salvation is, quite sadly, the most disappointing movie in the series. That being said, I love seeing stuff about Terminator endoskeletons and this behind-the-scenes video of them rehearsing with one of the puppets is really intriguing.
Matt Winston writing for the Stan Winston School of Character Arts:
Talking purely from an effects point of view, whilst I'm not sure the look of the rubbery skin matched my preconceived expectations based off of Kyle Reese's description of the T-600s in the first movie, I feel that they achieved a far better balance of practical and CGI effects than they did on Terminator 3.
As a fan of the franchise, I'm actually really psyched about the new movie coming out, and I do hope that there'll be plenty of practical effects used where appropriate. Because it really can make a difference.
Then again, as Terminator Salvation proved, so can a good director and a good script.