I did a retreat where he was a teacher. I had a wonderful time; almost finished the quilt, didn't really like the outcome, but learned a lot. His trunk show is a genuine hoot!! I did learn that he and apparently other designers create quilts that they themselves cannot make go together and have to "fudge", but no mention of these issues is documented in the pattern or in pattern corrections. I have one in particular that I was collecting fabric for and found out the pattern wouldn't work. He did tell us how to fix it, but admitted that neither he nor McCalls issued a pattern correction. Amazing...