I loved this film.
It got generally negative views from the 'general' audience, mainly because it doesn't follow the standard story line which has been carried out three times.
If you havn't seen it yet, I really do recommend it, it's a great film. The storyline is rather easy to follow. However, at the start of the film it's hard to find out who is who, unless another character mentions another character's name or something obvious like that.
The fighting scenes are really well done, they always entertain you and you wouldn't expect 'What type of fight scene will happen next'.
Check this out! It's one of the Terminator bikes found in the film and is found in a chase scene.

The CGI is superb. I'm sure you will be surprised at a scene near the end. It concerns Arnie, and I won't give it away. :)
The fighting scenes are top notch. The CGI for the terminators is really life-like and well detailed. You are constantly entertained and as said, I really recommend this film.