Are you considering purchasing a ceramic flat iron? Remember to look for one with ultra-smooth ceramic/tourmaline plates that offer smooth straightening motion and won't pull, snag, or breaking your hair.
If you're using a flat iron every day, pick one that's ergonomically designed to reduce the risk of developing Carpal Tunnel Syndrome. You want perfect contact between your hair and the flat iron plates and even heat distribution. In other words, you want silky smooth, frizz-free hair.