The pressure cooker is well made and sturdy but the instructions for use are dismal. The 4.5L size is perfect, easily being large enough to cook food for 4-6 people, boil/parboil potatoes, make stews, etc. Not over-large, it is easy to store and doesn’t take up too much space. It cleans well and doesn’t stick. There are lots of positives but also a couple of negatives (which may just be down to user-error). I have been using pressure cookers for over 40 years, so am well experienced in how they work. This version is the ‘upgrade’ from my previous 20 year old Tower model which has sadly become defunct as some necessary spare parts (vents) are unavailable. The new model is very safe but nowhere near as efficient as the previous model. It is very difficult to tell when it comes up to pressure and food does not cook as fast, more water is needed and more steam escapes. The imprecise instructions regarding use has resulted in a lot of trial and error to get things right. If I had been a first-time user, I would have been unable to cook with it. I will be contacting Tower to suggest they improve their information.