My calculations when compared equal for equal, that there was not big difference in the total price.
Not starting a nations conflict/debate, I would stick to the tried and tested, I know of a mate had MCC done in Hungary, he got a job, but after TR done they did not accept his MCC, he had to go and do another one in Germany.
I have been in Slovenia, to be honest you will find us from west are a bit spoiled, was not my favourite place, to far back in time for my tasting.
Flight school sure was good, but my calculations that time worked out no cheaper than UK modular school!