I have been using the Rubbermaid Duralite Bakeware dish for several days now and have made main courses and even side dishes in it. The one I have is very deep (9x13) The dish is very lightweight compared to my cast iron and other dishes. The design is simple, yet elegant and comfortable to hold. The lid fits perfectly, however it does not seal very tightly. So far I have used the oven up to 450 degrees and it withstands the heat without burning my food. Cleaning the dish is fairly easy as well.