Off the head, the hat appears to have an over-zealous curl to the bottom edge.
On the head though, it behaves very nicely. And this, in it's unblocked state.
A solution to the tendency to roll would require only a minor change to the beginning. The directions say to knit one round then begin the pattern. Instead, maybe one round knit then one round purl. Or perhaps a few rounds of knit for a more decided roll, then one round purl to stop the curl. Even so, I am not unleased with mine.
Pattern: Ziggely Zag Hat. Free on ravelry
Yarn: Noro Kureyon - one ball and a very little amount of a second ball.
This worked for me, as I had leftover Kureyo from my Mitered Square Pillow.
It doesn't work so well if you must buy yarn for the hat.
This is a nice little hat. Just enough pattern work to keep it interesting but not so difficult as to torture the knitter. The type of project I like to call - A Double Feature Hat. Needles, yarn, two movies and you have a hat.