I'm not level 85 yet but it is MUCH easier with it, im getting alot of levels a day with it.
I made a new char and my guild asked me how did i get level 25-30 in about 30mins ;D
I must agree... this morning I took one Worgen Fury Warrior from level 40 to 50 in just about a couple of hours, on hard mode.
My guildies first thought I was joking with them cause I "dinged" so often, but when they checked the guild rooster they were just amazed about the speed i managed to level and that without dungeon leveling
So a big THANK YOU Dugi from me too