This is a great size.  I had the larger size but exchanged it for this 4 quart.  It's big enough to make a 6 person entree - and I don't need anything bigger than that.  I like that this is not aluminum ... stainless steel is healthier to use and sturdier.  Be sure to read the instructions.... you have to press two areas to put the lid on for the first few times.  Pressure cookers keep the nutrients, are FAST, and everything is so tender.  I love this and use it at least 3 times a week.