There are lots of models, not just size but features. So that may be thenlow price, people need to check.
I got one for my birthday in October last year, after a year if debate. As a present, it took the decision out if my hands. Maybe I shoukd have got a mote recent model, maybe a smaller one. I’ve only used it a few times to test things. But I have a good Lagostina pressure cooker from 1985 which has always been fine, though likely could use some new gaskets etc.
I use it, though mostly for cooking beans and brown rice.
I am less impressed with Instant Pot. You can’t really toss things in and let them cook together, except as a slow cooker. The recipes I’ve looked at.require using canned beans and cooking that with rice and the rest.
But.I’m still getting used to it.
I’m not prepared to trash the Lagostina, so at the moment, I need twice as.much space.
Pressure cookers are great, and.mine never 'exploded" so maybe Instant Pots are a way for more people to use them.