A few flat iron reviews become the most informative guides for those who are not sure about the perfect iron. Generally speaking, some must-have features represent the first things to look for. Temperature control is one of them. Most commonly, the control is installed on the handle. It is easy to set too. Some irons come with a temperature range, so it is controllable. Apart from classic levels – low, medium and high, you can just as well find the actual temperature in degrees. Not sure about the optimal level? Start with a low setting and go up little by little.