Rule number one for a great movie is you need a good story. And rule number two is you need great acting to go with it. Put those together and you'll entertain. Heck, you don't even need CGI. And if the acting is good enough, it will draw you in and keep you glued, because you have an emotional bond with the character and will even forget the plot. Then along come the movie Avatar with not much of a story, some light weight acting, and it's mind blowing alien planet CGI. However, you leave finding yourself somewhat entertained. Maybe even happily lost in foliage. But it's like sugar, only a quick rush, and then poof! You're done. Yet this movie persists and drags to the end crying out to be edited down. 162 minutes is way too much! So, it's worth seeing in 3D IMAX, then go home, get some sleep, and forget about it the next day. Don't worry, you'll recover from your sugar rush.