Any experience w/ either? Heard good things about SA, but just discovered Eurolines. Eurolines is slightly more, but better times for us.
I already answered the same question under Austria.
I have only used Student Agency with y=the Czech republic and found them to be excellent.easy to book on line and all you need is a booking number.Staff have been very nice and announcements in English and Czech.
We just returned a week ago and we used both bus lines. We used Eurolines from Krakow to Budapest, and we used SA from Cesky Krumluv to Prague. Both of them were great. On time, and made short rest stops. The SA bus did have drinks and snacks you could purchase. Both had bathrooms. Either line would be fine.
We ended up using StudentAgency. Very satisfied. It left on time, and very comfortable. Slightly late arrival due to traffic, but no complaints at all.