I just bought my first piece- a 9qt round. It's a tight squeeze on my stove but fine.
I've seen some people mention that you should never have it less than half full. Is that correct and why? We are a family of five and I find that my 7 qt crock pot is a bit small, especially when doubling some recipes, so I went for the 9 qt. I don't plan to fill it full each time though... it will probably generally be about 1/3 full. Is that ok? Am I somehow damaging the pot if I don't fill it to 1/2 full or more?