a couple of G115s on the fleet and they looked good (if it looks right it flies right?), so I checked out in one. Hmmm. Dullsville. Just like a PA28. So I tried the other. It was the same!
I've never had anything to do with Grobs. But, if they are a consistent aircraft, economical to operate, with characteristics like a PA-28, they must be a suitable trainer.
The flight training industry works well with plentiful, economical, and predictable available for their fleets. Friends and I were discussing yesterday a school who have sold off their fleet of Eastern European training aircraft in favour of North American counterparts. The Eastern European types spent so much time grounded awaiting parts. No matter how good an aircraft is in the air, if it's not in the air, it's not much good as a trainer!
Those who have mass produced an acceptable aircraft have filled a market need better than more limited production and support of an aircraft with superior flying characteristics.