I bought this pressure cooker in January of 2013 and have had nothing but trouble with it.  The second time I used it, before it even started to hiss, the pressure plug blew.  I ordered a new plug, but it will not build up enough pressure to even jiggle the regulator.  I know that the problem is not my stove, because the stove is brand new and I use my big All-American canner on a lot, with no problems at all.  I tried to order the glass cover so I could at least use it as a regular pan, but the part number IN THE PRESTO BROCHURE does not work ON THE PRESTO WEBSITE.  Presto may be the bestselling pressure cookers, but it has to be because they don't cost much, because it surely is not because they are great quality.  If they were half the price, it would still be a waste of money.