My journey began last July.  I have completed the Foundation Level. Often wondering if I am really getting it.  However, before moving to the Premium Level, I decided to review all of the Foundation Level. I was pleasantly surprised at how much easier it was than than when I went thru the first time.  However, the real proof of progress was when I recently played a Big Band gig, a Christmas Dance.  It included a half hour sound check and then a three hour dance with only one break. I had no endurance problems.  I felt very strong up to the end. I think I am now ready to jump into the Premium Level.
Thanks to you Greg!!