Here in the USA at a local flight school we had two groups of 10 ab intro students from a China airline. The airline requested that 5 hours of aerobatics be included in their training. I was hired on contract to perform that training. We used a Cessna Aerobat, which they could relate to and it is fine for the very basic maneuvers. Spending a little time climbing after a series of maneuvers lets you get your bearings and relax anyway.
Obviously some of the students loved it, and some would rather have been somewhere else. Not one of them became ill but a few of them did turn a little green around the edges. They all left with the ability to recover from some very unusual attitudes.
I would highly recommend aerobatics, just the 3 fundamental aerobatic maneuvers of loop, roll and spin.
Here in the US there is no aerobatic restriction on an instructor certificate and I have been teaching aerobatics for 35 years.
Bill