Quite enjoyable. Of course, many little details were off, the biggest of them being the inconsistency of CGI-Arnie (CGA?) not immediatly killing John Connor, but smashing him against the walls, basically giving him a chance. Why, why, why.
At least two action scenes were entirely without (Danny Elfman-) music for at least a minute or so. It gave you a wonderful raw feeling, just screaming voices and screeching metal.
Loved the very low rumbling of approaching flying vehicles. Almost a phsyical feeling instead of sound. There were quite a lot of (mostly visual) references to "Judgment Day", most of them executed in a good way which did -not- rub against the wrong foot. Admirable.