I received the Talon Karrde/Grand Admiral Thrawn and Prince Xizor/Princess Leia comic packs yesterday, and I think they're pretty nice sets. I have to admit that I haven't yet read the whole SOTE/Prince Xizor storyline, but his figure is pretty well done. The Leia is just so-so, nothing too exciting to me really.
The Heir to the Empire pack, on the other hand, is a real winner in my opinion. I never had the previous Thrawn, and was waiting for this one, and I think its a great figure overall. Just how I pictured him when reading the books. Talon Karrde is very well done too. I guess, aside from a few comics, that the Thrawn Trilogy is really the only EU I've read (and really enjoyed) so that may be why I like this set so much. I hope we see some more comic packs based on this storyline in the future.