Vantaggi
The best explanation is enduring an abusive / traumatic experience in a group environment, so you bond with people in the same boat more strongly, so I left with good friends. Having a job here should come with a lifetime of free therapy.
Svantaggi
Ironically for a company that prides itself on teaching teachers how to teach, the founders cannot teach, guide nor motivate. They will ruin your self-esteem and self-belief and everyone's around you. Please avoid working here. They also have a tradition of employing two people at one time with the foresight of sacking one and pitting you against one another. Really inclusive stuff.