One piece of strong advice. You must have unlimited patience to build this. It's not a matter of skill, but the emotional skill - I spent 3 days making this, I pick it up and ... BANG! Base falls out, I spent hours rebuilding it, then give up later after reducing me to tears twice.
There are loads of good points though; it comes with a Darth Vader figure [I have been looking for one for ages], an exclusive, no, two - Grand Moff Tarkin and the mouse droid - and 2 emperor's royal guards. These are especially good - the force pikes, the capes, the AWESOME helmets.There's also an Emperor hologram.
Overall, I'd say buy this if you're not going to play with it. If you like getting stuff out, buy the Troop Transporter - you get a brilliant vehicle, one imperial pilot, 2 sandtroopers and 2 normal stormtroopers.
Patience is everything.