I saw it; along with Hawk, KT, saRa and my mom. It was very, very, very awesome! It tied it all together in ways I can't even begin to describe. Though I found some things laughable, (Like thinking to myself "Dark Side Points Gained!" everytime Anakin went closer to the Dark Side.) I still enjoyed it.
QUOTE(BurnSide)
but does the movie explain perfectly the appearance of Vader?
Yes, though I thought the name Vader was kinda rushed upon him, it did fit it in nicely.
QUOTE(BurnSide)
The creation of the empire?
Yes, brilliantly.
QUOTE(BurnSide)
The reason Obi Wan and Yoda etc went into hiding?
Again, yes, briliantly.
QUOTE
The reason Obi Wan and Yoda etc went into hiding?
Yep, though it wasn't how I thought it would be.
QUOTE(BurnSide)
The appearance of the Storm Troopers?
I figured that out long ago, when I saw Episode II in theaters. It's really easy to figure out if you think about it.

But yeah, they explained it very well.
QUOTE(HolyDevil2053)
for all those that have seen it, was it good enough to pay to watch it again? or to just wait and buy on a dvd....
If I had the money I would watch every showing until it left theaters.

If I had to rate it, 10/10. The only downside, so it seemed, was the acting. In the very beginning it felt kinda cheesy, but then again, all of the Star Wars movies felt like that at first. It's just how they are.