If you have yarn that is very interesting, unusual, or for any reason you want to emphasize the yarn itself rather than the design, these tops are perfect. They are also easy to make changes on e.g., I usually need to lengthen the body, and that was no problem at all. So, while the patterns are not by themselves unusual, they provide an excellent means to show off a great yarn.
The pattern is easy once you realize what is going on but it took a search over at Ravelry.com to make sure that I fully understood it. It could have been a tad bit more clear. It's rare that I have to ask/read about patterns.