Hi Peter. And a big LOL to that!

Of course 'free and open' discussion is welcome! Hey, it's encouraged! And so I've added the category for you.
Listen, I'm a machine plasterer and I have been since 1997. I have no vested interests here and I make no money from training. I'm not biased to towards one thing or another based on brand, manufacturer, institute or whatever. If I think a material is good, I'll say it is. If I think a machine is good, I'll say it is. And if I think something in not of an optimum, I'll say so too.
Training in a booth or a center is NOT optimum. No way is it! And in fact, I don't know if he'd agree to say it on here, but I even know a 25 year time-served plastering instructor who wouldn't even entertain disagreeing with me on that point. He's said it himself. And he RUNS a training center!
But anyway, the category is added and you are free to tell the world how good you think training centers are, if that's what you want to do!
By the way .. just a thought: do you own or run a training center then by any chance?