I got an email this week from a reader on the cusp of making a small fleet purchase for a few flight schools. I was asked for an opinion on the various choices in the training market. The more you think about this, the more difficult the decision actually is. There's simply no perfect airplane for the task. Each choice is compromised in some way that favors another choice that's compromised in another way.
This is a companion discussion topic for the original entry at https://www.avweb.com/recent-updates/business-military/whats-the-best-flight-school-trainer