We booked a trip from Prague to Dresden with Svejk Tour during Easter weekend. I cannot say anything about this company, because we were put in another company's bus (Express Tour) with no notification whatsoever and continued our trip with them.
No problems with Express Tour though, everything was nice and the bus was on time.
I've heard from other tourists that companies do these things sometimes, when there are not enough tourists. But during Easter weekend? Really?
I've written a review about it on the official website of Svejk Tour. Wasn't published, what a surprise!
Would not recommend it. Who knows where they will put you next time!