I have been canning (everything) for about 40 years...I learned from my grandmother, mother, aunts, etc. If I could only have one canner, it would be a pressure canner. Things requiring a water bath can be brought up to 5# pressure and immediately turned off and you get the same effect as 10 minutes in a water bath and it does not hurt the food. I do this with all my pickles, jams, jellies, etc. and have never had a jar go bad. Follow the care and cleaning instructions that come with your canner and there will not be a problem with it "blowing up"! Any pressure cooker will blow if the steam hole is plugged. Make sure it is clear (I just hold it up to the light and look through it) before you start. Do not try to cool down the cooker rapidly when you are canning. This will cause the vacuum that is formed to suck all the liquid out of your jars. I just slide it off the burner on the cool one next to it and let it sit until the pressure completely falls. A jar lifter is the next greatest tool you can have. The jars are always wet and if they are hot, the hot liquid soaks into any towel you use and you always get burned unless you have the patience to wait until they are completely cold! I keep a place mat sized hot mat on the counter to move the jars onto and check to make sure all have sealed and cooled before putting them away. If they don't seal (occasionally one won't) put the jar in the fridge and use it within a couple of weeks. It is as sterile as the ones that sealed, it just won't keep. If you try to put another flat on and cook it again with the next batch, you will have a jar of mush so don't do it. It's really easy and you can do it!