I'm really glad I did them - [color=red]once![/color] They were definitely a tough knit. Not because the technique is hard, it's more that it's unforgiving. With most knitting, if you make a mistake you can fix it fairly easily if you notice it quickly. Doing these, I eventually figured out how to fix mistakes, (knitting the inside sock with the outside yarn or vice versa) in the leg and/or foot. But when it came to the heels, I never was able to figure out how to fix it when that happened, and had to frog back to the beginning of the heels a couple of times.