Product review (2 stars): Preheat mode is only a marketing gimmick.
The quick preheat option is a joke.  It only preheats for a set period of time, around 5 minutes, then goes into regular cook mode.  For, example, the default temperature when you start the quick preheat is 350 degrees.  After 5 minutes the oven beeps that it is at temperature.  The oven is really somewhere around 250 degrees, but the display still says 350.  At that point the oven stays in cook mode, which means that it continues heating up to the preset temperature very slowly.  Much slower than the normal preheat. I purchased this oven in early January 2015, called Frigidaire three or four days later about this problem.  Today, April 15, 2015, a repairman finally arrived to check it out.  After testing it for about an hour and a half, he called Frigidaire to talk to them  The Frigidaire tech rep actually chuckled when he heard the problem.  He said words to the effect that this "feature" is just a marketing tool.  He then went on to explain to the repairman at my house how it really works. We purchased this model because of the preheat mode.  We could have saved a few hundred dollars and bought the cheaper model.

Otherwise, the oven works quite well.