I have done two from that book and personally I would say for ME a Bargello is easier than a pinwheel quilt! lol I know it sounds really stupid but I put a (short) twin size surf song together in seven days from first cut to wash dry deliver. However I have been working (more off than on) for a year and a half on a pinwheel quilt and have all but given up on it because they don't "look right"!
I think the word BARGELLO scares people!