By fluke I was able to purchase the same yarn used in the sample (different colors). I elected to knit my sweater in yellow and green. It reminds me of lemon-lime and early fall colors as the green starts to fade.
I intended to knit the XL, but the designer convinced me that it would have too much ease and likely look sloppy. I've gotten most of the body knit and when I ran out of one of the colors of yarn, I switched to knitting a sleeve in order to test the sleeve instructions. So far I haven't had any difficulty with the pattern. I look forward to getting it finished soon and wearing it. I'm even planning to knit another one, perhaps using Miss Babs Yowza. I'm curious how it would look in variegated and solid yarn combos.