i work at the moment with the AK4 and it is a dream for me. I find the handling is very good. Ok i think its better to read the manueal. In the reviews every reviewer said that the Display is to small but thats a matter of taste. I like it.
But the rewiews are very very positiv. Ok and the price is high. but i payed it gladly. The machine is very good.
I learn at the moment a lot of this machine.