Received the pan in excellent time. Tried it straight away on my glass top stove on MEDIUM heat and it warped and lost contact with the job. It's now permanently warped. It's only 1.5mm copper which is probably the cause. I guess if you had a gas stove it'd be fine, but not solid tops. I would recommend higher end copper such as falk or mauviel over this one, despite the much higher price. Overall pretty disappointed with this item. I've contacted De Buyer who have not responded.