The cooking results from the Breville Fast Slow Pro are excellent, but there are 2 issues I find troubling. 1. the seal on the the lid is quite ticklish. If you haven't got it just right, the cooker won't proceed to cooking after preheating;  2. you don't know until the end of a (lengthy) preheating phase that your lid isn't sealed. If one knew earlier on that the lid isn't sealed, one would waste less time.