I only can say, i made my FAA license with Jeppesen in Denver almost 3 years ago. Since then i am runnig very well with it. I was changing companies last year and it was very very easy to find a job with the license.
Even more as some operators setting the license as requirement, also in europe already.
So to say it was a waste of money, totally false statement. everything you hold in your hands, is good for you. my opinion.
Just to say, i am dispatching about 60 flights each shift. and the stuff learned during my course is helping me everyday.
Greetings