I have to say that the instructions for the short-row heel in that book are lacking, and caused me one very frustrated evening. I have come to the conclusion there are several errors in it, even though that page is not listed in the official errata for the book. In any case, I prefer the look of a short-row heel to a heel flap, so I didn't give up. The round toe I knit according to instructions from another sock pattern completely, and I have to say it's my favorite toe finishing technique. The only downside is that it takes up a large portion of the foot.
I haven't made up my mind about this yarn. The colors are gorgeous, but it's slightly too thick for my taste, especially if I try to incorporate it to patterns written for fingering weight yarn. That's why I'm using it on More Sensational Knitted Socks patterns, so that I can more easily choose a formula with fewer stitches. I've also learned from another pair of socks that it tends to stretch after washing, so I have to be extra careful about not knitting the sock too large.