@sozobe,
(reading back)
I didn't have one until a couple of years ago when I picked up a small cheesy one from the grocery store. I use it for cooking beans of many sorts, garbanzos, for example; I don't have to check them much.
I'm at home most of the time, and for my favorite dishes, like Marcella Hazan's low simmered bolognese sauce, I use my army surplus cast iron dutch oven. I
like checking it.