For these mittens I used Jamieson's Shetland Spindrift, which was okay, I wasn't crazy about the yarn. I found that it broke quite easily, there were a couple of times that it broke while I was looping the yarn around my needle. The other thing that I found about this yarn was that the first skein I used didn't quite complete the first mitten. I was halfway through the thumb and had to break into the next skein. The second skein finished the first mitten, and the entire second mitten, with a little left over at the end. I'm not sure about the length difference, the tension was the same throughout, and I undid and used my sample guage... Despite my not being crazy about the yarn I love the pattern, and am very happy with the finished product!
2 Christmas gifts down, many left to go!