Leveling is quite fast here. But when it comes from 50 to 60, it takes much longer than before. Fortuneately, you got many alternatives to level your classes (Palace of the Dead, Beast Tribes, Duty Roulette, s.o.).

The only thing that bothers me is, why do you actually need to level your classes, when the most fun part starts with Level 60? Even when it goes quite fast to reach Level 60, its not actually fun.