Always check the vent hole in the lid before sealing it down. Don't ever filled over 3/4ths up, and don't EVER put your face in way of the rubber safety plug. We had one blow off once, and it dented the aluminum grease trap in the exhaust vent over the stove. Plus a large amount of steam and hot water was vented. That's the only issue we've ever had after years of using pressure pots - we use them for cooking meals as well as for canning.
Ya, we’ve got an instant pot we use for cooking. Love it.
We’ve also got one of the big all american canners we got for Christmas one year but have been afraid to use.