 Well, student discounts are not just in Slovakia, in Czech Republic, many times you can pretend as Czech student with the Slovak ISIC and get a 50% discount in your ticket, In Hungary, students will have discount in the return ticket, meaning that if you go for example, Budapest-Pecs and buy at the same time Pecs-Budapest you will have -60% discount, very useful because trains in Hungary are more expensive than in the previous countries.
Also in Slovakia not all trains are for free: RegioJet, the private owned more modern trains (actually the diference is not huge, since national trains are quite good) offers a -50% discount, but there is no way to get it for free. |