So far the leveling in WotLK has been slow. The required experience points to level is around 1,500,000 per level while gaining 1k experience per mob and 20k per quest. But with a bit of daily rest experience saved and questing, plus doing a few dungeons makes it not feel so bad, just slow. The zones I have seen so far are also pretty nice and very well laid out. Also worth noting is the new trade skill inscription which Buobuokittii decided he needed far more then skinning. I am almost maxed now with it and everyday discovering a new recipe. Lastly the mobs, Blizzard has created some really cool new NPCs for the game. Some of them are odd and other are just plan cool. But put into the new zones all of them really fit the bill for a great expansion. I already look forward to the next quest and zone.