Mermaid 30cm Baking Dish 5 "best in world" Mrs Mc Kee 03 March 2014 I have used mermaid trays and baking dishes for some years now and can honestly say that they are the best in the world. Never having any problems with them I can recommend them to everyone. I am an OAP now and can speak with experience. I have never used a scourer on any of my Mermain dishes and as long as you follow instructions they will last a lifetime. I cannot understand your other reviews that say that they are no good. They must be doing something wrong.