The effects are amazing. It really is the best CG I've ever seen. The story, a mixture of Fern Gully, Dances with Wolves and a smattering of Aliens, is a bit trite and gets tied up a little too easily. I'd say go for 3d/IMAX over anything else (regular screen/non 3d Imax) because the world of Pandora is best viewed as large as possible. The effect of wearing your 3D goggles gives you somewhat the same effect as Jake Sully's entrance into his Avatar--you enter the world upon putting the 3d specs on, you leave the world when you take them off.
It's not the original fame. No. But it stands out as a viable movie about a changed industry. Each of the characters goes through difficult times and each faces some tough choices. I thought the actors all did a great job. All in all, I gave it 3 stars because though it's not the movie of the year, it touched my heart and that was really because of the standout performances--especially the cameo from Megan Mullally.
The Title Says it all. Campy enough to still be Star Trek, yet sexy and smart enough to rival BSG in 'cool'. I would recommend this to Star Trek The Original Series, and Next Generation fans (like my father) and Trek noobies (like the friend I saw this with) alike. Everyone will have a good time at this. It was Vulcan Awesome!