Yes, and yes.

Rating: 7/10 (1 June 2010)

Yes. It is visually stunning. Absolutely wonderful rendition of the world of Pandora and of the people places and creatures and plants. It is easy to believe even the fairly ridiculous because it is so beautifully and realistically rendered.
Yes. The characterizations are cartoonish and the plot is positively childish. Unsubtle to the point of laughable and to the point where you could pretty much predict who was going to live and who was going to die and how - long before any serious fighting started.
What I noticed most though was just how much opportunity was wasted.
The entire plan of both sides - and the director - was "shock and awe" either in numbers or machinery or CGI. Someone, somewhere, should have discussed tactics, and a simple 20 second discussion of tactics would have made the tension that much more dramatic in the big set piece battle.
Someone, somewhere, should have actually tried to negotiate... to at least try to find a way that both sides could get what they wanted.
Everything about the storyline looked rushed except for the set piece battles and fantastic graphics and the battles got boring because there was no plan to them to provide "is the plan working" tension and no real surprises as to how it was going to go.
In summary very good in a rather childlike way with enormous wasted potential to be truly, magnificently, great.