I have been in the business of food & teaching people to cook, along with appraising cooking equipment, for 50 years. Bread baking is a passion. I decided to treat myself to the Challenger & I am thrilled with the oven spring, ease of use, the thoughtful design with the all importnat good fit between base & lid to retain the steam generated by ice cubes. I attach pics of my first bake in the my new Challenger. I use this in the Aga, it works perfectly, in the Roasting oven, grid shelf set on the floor & Challenger sitting on the grid shelf. I remove the lid after 15 - 20 minutes of baking, and finish the bake for a further 20 minutes or so. I would not hestiate to recommned this purpose built Dutch oven. My first one arrived with a crack in the lid, but Bakery bits had a new one to me next day, outstanding service.