During the full last week, I was in Erlangen (Germany, close to Nürnberg), following a workshop on the diffuse scattering simulation program DISCUS.
It was lots of fun, but I had kind of hoped for something else. A lot of the first day (and sub-sequent days) were used on how to use linux and the terminal (and ranting about how bad windows is - that is, using bad and wrong arguments for it...), instead of introducing the program in a good way. We went through a lot of different tutorials, but a lot of it was very hurried, and not very deep. I guess that at least I got a lot of tools back home with me, so if I really need to use the program (I don't know if I will, yet), I have something to read up on.
I did buy the DISCUS cook book beforehand, and read a little in it (I didn't get that far because of me being really busy). I must say that it was a really expensive book, due to the fact that you can only get it i hard-cover, but it is well written - and I think I've learned far more from that short period of reading in it, than I did from the actual workshop.
All that said, I would probably recommend people going to the workshop if they actually intend to use the program themselves. It's really hard figuring out the small logic things on your own - like the fact that they have three different independent programs in the package.