I just got done building the AT-ST and...WOW!!!
If you have the original and were as let down by it even when that was the only thing around then you've GOTTA get this! I usually don't get pumped over a simple $20 set but it's really quite decent. It's quite large (about 8" tall when it's standing properly and about 11" with the legs fully extended) and is in quite good proportion to the mini-figs.
It came with several elements that I've never seen (I only do SW LEGO now so they're probably in other sets) and I noticed a neat thing (once again probably been around awhile) and that is that they now list all of the parts and show a picture of them on the back of the instructions. I know they used to do this for the Technic sets and the Model Team ones but I didn't know they started doing it for the system sets.
The one real selling point for me though was the badda55 AT-ST Driver!!! He looks sweet and the addition of the new blasters (I liked the old ones because they were made of existing pieces and were so generic that you had to love 'em).
The only real "faults" that I could find are, in my opinion, the eye holes are a bit small and the face is a bit long. Also they could have done a bit more in the interior with the amounts of space that are in there but what are you gonna do? Other than those minor ones it's about as good as it gets without getting the UCS one.
My over all grade: A-
BTW, I clocked in at just under 30 minutes for the build.
Long in the Face
The Reason I Bought the Set