I have my set for one year and way before than the pans are all dark stained the color outside the pan is all stained and the inside looks like i have them for 10 years ...besides that i had one of the tops not even close to the fire and all of a seden it cracked on a million peaces ...i feel so sad because it was a gift from my kids ..i don't know if they use cheap materials but it is not worth the price of the pans ...