Some of their practice does suck, but it does work nonetheless since nearly everyone end up finding a decent paying job after graduation. You could find bad things about the public institutions too (some people complaining about coding on paper, outdated etc).

As I said "This kind of discussion will end up being the typical (French) disdain between people learning engineering in the public schools v/s the ones learning in these "practical teaching" private schools and vice versa."

At the end of the day, both ways work. One is free if you fit the public education.