Is awful. The flight ceilings are so damn low in Felwood/Ashenvale that it's impossible to fly over the trees, so you run into frakking everything.
I've been leveling Archaeology, and it's really messing with my system.
By contrast, Eastern Kingdoms is fantastic. You can fly over all the trees in STV, and once you aim yourself via the continent map, you can go make a sandwich or get a beer.