What horror stories have you heard lately? You do have to operate pressure canners properly and watch them just like you do with many other things you cook with but they have safety devices so they are not going to blow up and scatter shrapnel throughout you kitchen.
Just like you don't want your Mr Coffee to run out of liquid you don't want them to run out of water so you read the instructions and see how much water you need to put in. Put the rack in so the jars are not setting on the metal bottom. That keeps the jars from shattering. You do have to take care of a few basics but it's really not that complicated. You have to follow basics with anything you cook. If you can cook you can pressure can.
You do need to watch them. You can't put them on and go to the grocery store. There are two basic types, the weighted rocker or the gauge. The rocker seals steam in until you reach a certain pressure, then it releases excess pressure. They can be loud and annoying. If you don't have the rocker type, you do need to monitor the pressure gauge so the pressure doesn't get too high. That's the type I have. I've done it enough that I'm comfortable washing dishes and such while canning. I also get a lot of reading done when I pressure can.
If the pressure gets too high (mine never has) they have a safety device that releases the pressure. That is going to be a sudden release of steam. You may have some clean-up to do afterwards but that should just be water. It will scare you, that noise will get your heart pumping. But that is not a horror story, it is a horror story averted. The safety devices worked to avoid a disaster.
What kind of stove top you have is important. You should be fine with gas. I had an electric coil type and ordered a special canning coil. It had extra reinforcement to handle the weight and was raised a bit to allow the excess heat under the canner to escape. Canners are kind of wide. They can trap heat underneath and that can build up to where it can damage the stove top. I canned a lot on a regular 8" coil until it broke from the weight and got the right kind. No damage to the stove top. If you have a glass top or some other type you might want to talk to the manufacturer how to use it or if it is even possible.
There are basics you need to follow, but there are basics you need to follow to use a microwave or a Mr Coffee. If you can use those you can pressure can provided you have the right stove top.