I was reluctant to buy a pressure cooker with a separate pressure rocker after having used one with a one-piece lid and pressure adjustment by only one hand. But I wanted stainless steel, big enough to make a batch of chili yet small enough to be frugal with shelf space. Another consideration was the weight of the kettle -- both empty and full. Though a larger size might seem more versatile, I decided I would use it less if it were heavy to "drag out." Budget was another consideration. I am very happy with the 4 qt Presto and would not change my mind about it at this juncture. I did also order a stainless steel basket and trivet to be able to cook more than one food without blending flavors. The insert that came with the pot was aluminum.