Best ever sponge tins, heat conductivity is excellent, cakes are often ready 10-12 mins quicker than what a recipe states. So one is saving on electricity bills and we all know how expensive energy bills are currently!!!. Greasing with melted butter works the best having tried with groundnut oil. If any cake mix sticks to the side, very easy to clean, no having to soak for hours etc. Have no doubt that this item will last a life time. You can`t put the item in a dishwasher but because clean up is rather easy that is not really a issue.
In addition to other positive reviews, I'd like to mention they are stackable. Other same size baking tins are not. And because I have two (because Delia's recipes require you to!) they are easy to store.