Saw it last week in San Francisco. Not bad but a bit silly in parts, with Arnie putting on stupid sunglasses instead of his normal shades. Was not as well done as the previous two. Characters, the human ones, are not as good as before. Overall a good film with fab effects but story is missing in parts. 6 out of 10.
Hollywood doesn't know when to stop sometimes. Without James Cameron at the helm it was never gonna be as good. Its Arnie's last big pay day and that's it.