I have attended one with Nicos Economopoulos in Beirut. It was certainly one of the grand photographic experiences I have had. Nicos is an amazing photographer with a personality to match, so there was much to learn and very pleasant to "hang out" with the man. Besides this, I found the experience of working very seriously every day, morning to evening, concentrating on shooting and nothing else to deliver the results daily. Besides that being surrounded by like-minded people....
All-in-all - worth every cent. I would recommend it without hesitation.
edit: in fact I'm planning on doing it again. Hope to join them in Kosovo end May.