I've have several of these over the years and they are dependable, easy to use and I can buy replacement parts for them.  Excellent quality and worth getting the stainless steel.  This is the only way to cook as far as I'm concerned.  I have an electric one by a famous chef which hasn't worked after using it twice (it cost 3 times as much).  This is a great buy.  Read the directions and follow them carefully and you will have no problems using this pressure cooker.  It is foolproof if the instructions are followed.