I have had the 4 quart pressure cooker for quite some time,  and based on its performance,  I purchased the 6 quart for myself and one for my daughter as well.  We are very pleased.  This is a good product,  but it is important to read and follow the instructions for use and care in order to get the most satisfactory results. I was raised with Presto pressure cookers, and have used others.  None have performed better, in my opinion.  The reasonable price is an added bonus.