Itter was one of the nicest town's I've ever been in, absolutely gorgeous. It's a sleepy town, but on Contiki you bring your own nightlife. This was one stop I wont forget.
I went alone last summer (06). I met some wonderful people…I liked it so much, that I am going on the London + Paris trip next week (alone again).
Make a visit to the Staropramen beer factory, Staropramen is a beer made in Prague and you can tour the factory. It is close by the metro station Andel.