Training was tough, sometimes frustrating and requires that you work at it.
That being said, I made it through and I'm not too smart. I can from an RJ, and learning the international operations takes a lot of work, understanding foreign controllers takes time. Preparation really becomes more important.
In the end, I'm happier than a pig in poop that I rolled the dice and made it on here.
Its probably not ideal for everyone but I like going home and being left alone for 2 weeks and I like having a plane ticket in hand when its time to go to work and go home.
Moderate skills and effort should be sufficient to get through training. Its not a slaughterhouse but its not a walk over either. Don't be paralyzed by fear of boogie men in the training department.