I went on the DSLR Part 2 yesterday at Tatton Park. It was well worth it. Nice easy pace and the instructor, Graham Nobles was more than happy to assist you, even if your questions strayed off. Plenty of outdoors assignments that made you understand how light, perspective and loads of other stuff worked.
At the end of the day, you are in the presence of a professional who's simply tips and advice can be worth its weight in gold.
I will definitely be booking others.