I bought these a while ago, having got fed up with non-stick trays that wore out quickly. The first time I used them, I just greased them well and was delighted when the fragile sponge just slid out neatly and without any sticking! They were easy to clean too. Would highly recommend and as my non-stick items wear out, I will definitely replace them with Mermaid. My Mermaid roasting tin and cake tins all work really well too.