They're fine. Not the end all be all of cooking.
Also, don't believe anyone who says you can boil eggs or do something else in 5 minutes. You have to add in what I call "shipping and handling" so you might be cooking at pressure for only 5 minutes, but it takes 10 minutes to get to pressure and 20 minutes to come back down. If anything I find it takes conventional stuff longer (rice, eggs, etc.), but you get a more consistent product (fewer broken eggs and burned rice) and can cook more.