I can recommed one in LHKA, ( skytaxi . hu ) I have only gone there for some time building, but the ppl students I met there seem happy, I was happy with them too
the problem is that there is nothing to do in that city apart from flying, there is a supermarket and that seems to be the landmark of the city apart from the aerodrome
I know people who have donde their nvfr with flyteam and havent heard of anything bad with them. But with them I'd go to Szedged instead of Budapest. The budapest TMA is very limiting, and a lot of ga traffic .