We have both of those sets! I got the Endor set for my wife... She loves it!At the recent Toys R Us buy one get one 1/2 off sale I picked up the Battle of Endor set and the Twilight Ship for my son. Its his 5th birthday tomorrow so I have been putting the Endor set together a bit at a time after he goes to sleep every night this week. I am leaving the minifigures for him to put together, but wanted to have the rest completed...he gets a little impatient putting the bigger sets together. I am having my wife wrap the big empty box and then I'll bring it out after he unwraps it. It is a really cool set with the AT-ST and all the minifigures. I am saving the Twilight for Christmas, if I can stand to wait that long.
The Twilight was one of the first new LEGO sets I bought back in January 2009 when I started buying SW LEGO sets and it's a B**** to put together. It's assymmetrical, so unlike some SW sets where you build one wing (or leg, or whatever) and then build the opposite side at the same time and in reverse, it's just one big mess because other than the main box (and even then!) there's no rhyme/reason to the design (the ship, not the LEGO design).