The minifigs are incredible! The parts selection (including new pieces) is marvelous! The price, though, is a bit high...
The Orc Forge set box is marked confidential, though I doubt that it's confidential anymore. But that's not the point. On that box, there are pictures of Fantasy Era trolls. How long ago did TLG begin planning this?
Also on the Orc Forge, there are Olive Green cheese slopes. I also spot at least two new pieces in this picture:
Helms Deep has some GREAT parts, including loads of hinges (yay!) and sand green bricks. The massive amount of LBG is also great, and there looks to be a plethera of great armor and weapons.
Moria: I'm not that excited about this one. The Cave Troll is decent I guess, and the obvious bonus is the minifigs. Parts aren't bad either.
Uruk-Hai army is great, it's got a nice bit of LBG and has some great army-building potential.
Weathertop has those spiral stairs in it. I also noticed that the black horse has red eyes, which limits who can ride it (what hero rides a red-eyed horse?)
Shelob Attacks is well designed. Gollum is interesting, and Shelob is wonderful!
Gandalf Arrives isn't anything special, but what can you expect from a small set?