I've owned this pressure cooker for many years and loved it so much, I purchased this one as a gift for my daughter.  People need to make sure they use it properly with the cover closed securely and jiggler attached... and turn down the heat when it begins jiggling.  The nice thing about using a pressure cooker is that it will continue to cook after the pressure has built up and the cover is left on, but the heat is turned way down or off.  So nice for exceptionally moist meats that would normally be tough when cooked...pork chops or a cheap roast will be so tender and fall off the bone!