I have never owned one or used one. I was always scared they'd blow up and I'd be scarred for life! Anyways my husband got me one, and I used it for the first time yesterday. OMG, it is amazing! I made a lamb curry in 15 minutes. The meat was falling-apart tender. What normally takes 2 hours of simmering was done in 15 mintes!
I am going to make a lot more stew type of things now. It saves so much on gas/electricty.