How can you go wrong with an Aluminum Presto Pressure Cooker?  After all, that's the cooker that was used by my Mother over sixty years ago.  As I recall, she never replaced it - just used it regularly until she died. I believe my sister wound up with it. Stainless may look better and last longer, but does not conduct heat as well as aluminum.  I won't use it as often as my Mom did, so this cooker will surely last the rest of my life. I'm 65. Besides, aluminum is such a bargain. I could see no reason to spend almost twice as much for stainless. And certainly not two to three hundred dollars for so-called luxury brands. All that's required is a safe cooker that holds a head of steam. The Presto has been doing that for almost a hundred years or more.