I bought this 6-qt stainless pressure cooker and have been very pleased with it.  The bottom is triple clad, and heavy-duty.  It is 'induction' ready, too, for those who cook by this method.  This pressure cooker is well worth the money and works well, cleans up well, and can accomodate the same stainless trivet and "little pan" that goes into the 8-qt stainless pressure cooker (which I bought before I got this 6-qt one.)