In the UK the rotax engines are a bit of a pain for schools.
Cracking for owners who are willing to hump fuel in.
But if you putting in 100 ltr plus a day into 3-10 aircraft and there is nothing but AVGAS available they are a pain in the arse to be honest.
And Beethoven I know I shouldn't say it but I would suspect that both the C152 and PA38's are the most regularly over loaded planes in exsitance.