I do not recommend any of these irons if you plan to share the straightener with a friend or relative. You will make the right choice when purchasing a straightening iron that features an adjustable heat setting. The reason is that such an iron lets you customize the heat output based on the hair you are straightening. So, unless you plan on using the straightener on one type of hair, opt to get one that features an adjustable heat setting to customize the heat based on the type of hair.