This cooktop was purchased to replace a gas cooktop that was installed when the house was constructed (over 20 years) My wife had previous experience with the ceramic cook top on a range we owned at our previous residence. The cook top fit exactly into the cutout from the previous one and the instructions were very clear about how to wire the device. I did the entire installation myself (I used to be an electrician) . I would recommend if you are not an electrician do not attempt to wire this device (240 volts). The cook top works very well and is it easy to regulate the temperature. We like the added features (variable burner small or larger) and the ease of cleaning. [This review was collected as part of a promotion.]