I have been using a pressure cooker for years and the new ones are much safer and less likely to spray the contents through the vent on to the overhead
as in yesteryear. Unless you like lentil soup on the overhead...amazing how much stuff can spray through that small vent hole..
but one can also be hurt very badly.
There are some great books out there you can find and your local bookstore and some websites as well. Here is one of my favorites: Miss Vickie's Guide to Modern Pressure Cookery
Books: " The Pressured Cook" Amazon.com: The Pressured Cook: Over 75 One-Pot Meals In Minutes, Made In Today's 100% Safe Pressure Cookers: Lorna J. Sass: Books
In todays economy I think you will also find the pressure cooker has application at home as well.
I bring one with me when I am teaching folks about life aboard.