Oh, entering Hungary by land was somehow always an awful experience. I crossed that border once and also, I crossed by car from Serbia to Hungary. Border police officers, Hungarians, were extremely rude, searching for cigarettes at some strange places until I started complaining in English asking why are they so rude and that I don't smoke at all. Still, up to this day I remember this experience :)
I hope I have the chance to travel more in Transylvania, I loved almost everything I saw.