I had my previous Presto 6 qt. for about 45 years!!!  Still going strong, but can't use it as it is aluminum and I now have an induction stove top and need a stainless steel version.  I've now used it one time and I'm thrilled.  Worked perfectly on my induction stove top and, surprisingly, found the top (lid cover) of the pot very easy to open and close (usually at beginning it can be quite stiff).  I'm so happy to be able to use a pressure cooker again.