Kenmore Range takes an unreal time to preheat, exceeds 20 minutes to come up to temp. They say it is normal because only oven element preheats and they do not use the broiler element to assist. Preheat times are not disclosed at time of purchase. Secondly, contol panel is discoloring from heat from oven exhaust after just 16 months. Unacceptable. read full review »