I always read the the one star reviews for a product for amusement. Nine times out of ten, it is obvious the user never even opened the the user manual or they are complaining it didn't ship fast enough which has nothing to due with the product. This pressure cooker works great if you follow the directions and the recipes, at least until you get used to it. I have decided to eat or more Mediterranean diet using whole grains and beans instead of meat most of the time.  I have cooked beans and lentils in it with no sticking or burning because you only process it for a few minutes then turn off the heat source and let the the pressure dissipate on its own. I would never cook a acidic food that is cooked a long time( like tomato sauce) because it is aluminum, but tomatoes that process a couple of minutes I wouldn't worry about. If you are going to do use it for a lot of acidic foods, definitely go for the the stainless steel. If you cook grains in it, the directions say do it in a stainless or glass bowl that you put in the cooker. If one has a brain and can read you won't have a problem with this cooker.