Good design. Thin metal is use which cause burning the food easily.  The center of the pan was bumped up when l received it. I wonder if l can receive a none deffectecd one. I didnt use it yet. I put it back in its box. I think UPS should pick it up for returning. 
I also noticed the non stick interior is not a good material. It has glittering material which I think it can release in the food through heating which can cause health problem gradually.