Calorimetry was quick, easy, and fun to knit. The shaping is via short rows, very much like bust darts or sock heels. I could've finished it in one day, but I had other things on my plate, so I worked on it for about 3 days, but altogether it took about 2 hours to knit.
It's a little narrower than the actual pattern, so it's more like a wide headband than a headscarf-earwarmer. I modified the pattern by using Red Heart Super Saver, CO'ed 100 sts, and worked it on 4mm needles. I knit down to 34-32-34 sts before increasing. Instead of a button, a twisted cord holds it together. Next time, I'd like to try it with wool, and CO all 120 sts to make the thing wider.