I have a confession to make: I’ve curled my hair every single day of my life. Okay, maybe there were some exceptions—like that time I was on a flight to Patagonia and there were no outlets on plane. Or that other time when I gave birth. But for most of my life, curling my pin-straight tresses has been part of my daily regimen, held in equal importance with brushing my teeth or washing my face. So believe me when I say, I know what makes a good curling iron (and what doesn’t!).