As has been stated, the tech is good. Phasing is interesting the first couple of times you see it, but you quickly notice exactly when they’re changing sets. Oh is that why they keep having me mini-zone? I am starting to get the hang of vehicles.
Most of the storyline is good. Betray your former allies, slaughter the innocent, corrupt the living, torture people for information: everything you should demand from a soulless monster under the will of the Lich King. Then you get to the ending, which is long and boring and lousy. Let’s dial up all the numbers for the big fight, then make it so none of them matter anyway! Let’s have a story of betrayal, which is exactly the Lich King’s right and what you expect from him, rather than a stunning revelation; the whole point of having undead minions is to send them on suicide missions for your fleeting tactical advantage, which he somehow fails to convert despite being the freaking Lich King. Way to have the Big Bad fail, lose, and be defeated trivially in his first appearance. Let’s have a story of redemption that no one cares about because we have no reason to care about any of these characters, to say nothing of wtf did that come from. And what, we piggyback on his redemption?
I’m parking the Death Knight just because I no longer care about it after that introduction. But it seems like a good first class whenever you go to a new server, because you can get Burning Crusade gold quickly and mail it to a character you are interested in.