Hi
I did this holiday last month and as Di has said i did promise to post some feedback, so here goes.
All three cities are really nice and you get a morning guided tour in each of them as well as quite a bit of free time to do what you want as well. The hotels you stay in are fine, but the one in Austria is quite a way out of Vienna, so you are pretty much tied to the organised excursions while you are there.
I wouldn't take too much in Czech and Hungarian currencies if i were you as the only meals you have to pay for are the lunches. So unless you intend a mass shopping spree while there you don't really need that much.
This was my first holiday with JY as i normally do long haul holidays with another singles company, but i can say that i will probably use them again as everything was very well organised and the rep we had was really good!
Anyway, enjoy your holiday in June and if you want any other info just ask.
Paul