I have three. A huge one for canning and two smaller ones. I will probably give one to DD to try. She's been wanting one and I really don't use them as much as I did when everyone was at home.
I've never had a problem with mine but MY mom would never touch one. Grandma used one alot though with no problems that I recall. I did have a friend that had one blow up once- what a mess!
I think they are easier to use on a gas stove rather than electric but that could just be me.