I can speak for John's workshops. I attended one in 2004 and I am going to attend an advanced workshop this fall. While the workshop I attended was not a "working" workshop (The attendees did not print. John did demos), I learned a tremendous amount and put my notes into a spreadsheet so I would remember to do each of the things I promised myself I would do. My photography has improved quite a bit as a result. I am still not satisfied with my "final" prints. But who is? I can say that they are a whole lot better and a lot of that improvement is due to attention to fine details I learned from watching and listening to John. Besides all of that, he is a great guy to spend time with, his team (Anne Larsen, Laura Bayless) are very helpful , the location is the best, and much more. Highly recommended. I can hardly wait for this November.