Pressure cookers are VERY SAFE!
Specially now that we live in a world where everything ends in a millionaire sue.
Some decades ago, pressure cookers had nothing more than the safety screw (usually red, a screw that pops and relieves the pressure before the PC explode.
Thanks to the lawyers, nowadays the PCs have so many redundant safety devices that even intentionally it's virtually impossible to explode a PC.
Note that "explode" a PC is one thing, trigger the safety devices is other much different.The second situation makes a mess, but won't harm even if one is stand next to the PC. The first situation causes a huge destruction.
Answering: I love my pressure cookers, I almost always use them. And with proper atention, they aren't danger at all!
Something I'd love to have is one of those american style pressure canners. I'd love to make my own canned foods.