I pre-ordered this game, tried a whole beta weekend and decided to cancel my preorder.
It's not that this game is bad. It's far from it. The graphics are beautiful and the interfaced is polished. It's just that this game is really, really bland. It fails to break from the trope of Kill X and fetch quests (WAR at least tried something new with PQs, LOTRO had great storylines attach to their quest lines). Flying actually REMOVES an element of tactics in PvP, which is the terrain. Boss fights are still pretty much tank and spank.
Not a bad game by any means, but I've felt I've played this all before, and I have. If you're looking for WoW in a different environment, this game will definitely sate you, though.