I have loved this, light, plastic, casserole dish since I bought it - very cheaply (!) from this site a few months ago. It is a great addition for microwave useage - potatoes take about 20 minutes, as with normal cooking, but those I have used come out absolutely delicious. as do other casserole ingredients. It is a question of experimenting with your own recipes, timewise, but you can hardly fail - if you're on the cautious side, you can easily put it back in the microwave for another few minutes after prodding !