I have no experience with the program, have taken no classes, and am not a certified appraiser, but I would take ANY class taught by Gerald Roy in a heartbeat! He is brilliant and is one of the kindest people I have ever met (he lives just the other side of the mountain from me :D ). He was one of the first board members of the appraisal program and helped establish the certification guidelines. If you have specific questions, he would probably be willing to answer them for you. The contact info is on his website at
http://pilgrimroy.com/