I have not used her patterns but looking at the photo of the quilt you are interested in making, it looks quite straight forward. The stripes are cut at varying widths and some are cut a little 'wonky' to give more interest. Then the blocks would be squared up and sashing would be added. Even her description states that this pattern lets you use your own creativity when constructing the blocks.
Before paying $15+ I think I would try to make a sample block of my own, using scraps.