When I swatched, I got gauge on a #5 needle. The sweater is knit side to side in garter with short rows. I like all the different picture angles they provided on Knitty.
I used the long tail cast on. You know how you can sometimes end up with either too much or too little yarn? Here’s a tip you can use whenever you have 2 skeins of yarn or a center pull skein. You don’t have to estimate at all. Make a slip knot using yarn from 2 different skeins (or the inside and outside strands from the same skein). Leave approximately a 4″ tail. This slip knot does not count as a stitch. Place the yarn around your left hand for the long tail cast on. You’ll be drawing the yarn from the 2 different skeins and therefore won’t run out of yarn. When you’re done, cut free one of the skeins and carry on with your knitting. Cool, huh?

I think the construction of the sweater is really interesting.
I made a little chart on a post it not to keep track of the repeats and rows in this section. Garter goes quickly!