Yeah... in the movie they clear up why Arnold is back, why the machines are still coming back through time, and leave it wide open for part 4.
But it was good... VERY good, with a surprising amount of humor in there too!
My GF didn't LOVE the first two (she thought they were OK) but really liked T3 last night (saw the first showing the day before iot opens
). Furlong (connor) actually does a good job and is believable... and arnold just plain kicks ass again! And the chick is as terminator as the others. DAMN. And the action is pretty freaking awesome (like the cable from that huge truck in the chase scene).
SO, go see it. IT's really good. IT SEEMS a little short, especially if you just watched T2, but it is still a great hour and 40 min.