Warhammer online has ambition, but ambition alone will not make a good game, it lacks crucial elements to make an MMO.
The Warhammer universe has never failed to please me in terms of lore and history, it's a well placed and sometimes absolutely insane fantasy world, and Warhammer Online uses this fantasy world to it's advantage, because of the lore the sheer number of classes, class options, skill options, attacks and so on are absolutely shocking, whether you're the powerful Elven White Lion or the lone trench coat draped Witch Hunter you'll explore a world of options.
Warhammer Online's graphical quality is very high for an MMO, however the color is somewhat lacking, the environments will feel old within the first few hours and like you've been to every one of them before, everything is a bit too GRIMDARK, though the textures are beautiful.
Warhammer Online's musical score is something to praise, but the sound effects on the other hand aren't. The sounds are half-baked as if somebody muffled every one of them, whether it be gunfire, walking across a stone road, or your blade striking plate mail the sounds will be there, but they'll never quite impress you.
Warhammer Online's gameplay is it's biggest flaw, it borrows from other MMO's but fails to create the same feeling, in Age of Conan everything seemed to flow together as far as quests, you were given orders and you completed them, it wasn't a complex process, but wasn't over simplified either. Warhammer Online's quests are just the same 3 recycled over and over again (A nod to World of Warcraft)
Warhammer Online fails so horribly in one area however I docked two points off of it; It's clunky. Everything is clunky, you must face your enemy DIRECTLY, the animations seem like a 3rd of the frames are missing, the action moves don't respond right away, and everything just seems to achingly slow, even when mounted it seems like you should be moving faster.
All in all Warhammer will not even scratch the surface of World of Warcraft, but it will single handedly take down Age of Conan.
World of Warcraft fans, stick around for Lich King.
Summary: Warhammer Online will never once immerse you, while you have plenty of choices, the graphical and sound elements of the game turn out to be half-baked and repetitive, more so the entire game seems 1/3rd too slow and clunky. 6/10.