I disagree, and as a newcomer to imac and pattern, I will need to learn it all too, the thing that concerns me is the terminology between caller and pilot, which is something new to me. I see arresti as being clear concise shorthand for the caller to work with. I also see a lot of value in learning about judging, the criteria, values and demerits etc can only help a pilot to judge himself accurately as he practises. It will give him a good idea as to how he is flying and an help overcome bad habits etc. Not everyone has an advanced level pilot to help him along getting it together either. Is it complicated? I dont think so, but like any competitive sport, its not something you just go and master in 5 minutes either.