For those who take issue with the irrationality and illogicity of the galaxy far, far away, it's fantasy. It's escapism. It's not meant to make sense.
About the movie, I won't spoil any scenes, save to say:
1. The special effects were AWESOME. Make sure you see it on a digital screen though...Lucas shot it with a digital camera so it's designed for that medium.
2. The plot was quite thin IMO and seemed to meander all over the place.
I'd give it 7 out of 10.