I bought a CX-2 or what ever its called when i was in Florida doing my PPL in 2003, I could not get the hang of the EB-6.
As you are only alowed to use the a Whizz wheel on your ATPL's well i bought a crap-5. I now dont know where i would be with out it.
I may be sad, but you have to be good with it to pass you Gen Nav, if you haven't mastered it by then you are in the crapper.
Once you get used to using one you are laughing, would not be without it now, no idea where i put the electronic gadget.
FF