CLAIM With curved and ridged panels that extend when needed, this ceramic-plated flatiron can straighten and curl hair. EXPERT OPINION "It glides over strands and makes them perfectly smooth," says stylist Denine Smith of the Warren Tricomi salon in New York. "The retractable wings are clever but don't yield a flawless curl—more like an imperfect wave—especially for novices." OUR VERDICT Straightening was a cinch, as was creating loose waves. But to curl hair, we had to clamp down tightly while winding and spinning the tool. It took some dexterity.