Very mixed, already like all the concepts of "priv...

Very mixed, already like all the concepts of "private" schools, their primary vocation, like any private business is, do not dream, to make money, the trainers are professionals of the subjects taught and not "teachers" trained to teach these disciplines and that makes a big difference.

Which means that you often play Russian roulette, you have quality speakers who really teach you things, and then quite regularly people who are unable to teach anything because "prof" cannot be invented , suddenly you pay to be self-taught in bulk.

This also sometimes implies the ability to judge your work, because you have to be honest the trainers are not always cracks in their disciplines and I am polite :).

Even if to qualify there were also some very good trainers, when you pay so much the year this should not be the result of chance.