My short review (no real spoilers, but in case anyone's avoiding any opinion, it's in spoiler tags):
Spoiler:
Same flaws as the second. Acting, dialog, action all awful, in my estimation. A couple MAJOR continuity mistakes, one that could have been fixed with dialog looping, one that's written in and completely contradicts something said in Jedi.
I liked the last 30 minutes, and, much like the second, I liked the underlying story elements and select individual effects/characters. But the movie around it was just as bad, Christiansen is still holding steady at one and a half facial expressions. As good as things got for the last half hour, not worth the first 2 hours of bad movie.
So there ya have it. I'll go into detail eventually.