Cooking in a pressure cooker has only benefits. Broccoli that is cooked in the usual way loses up to 40% of its nutritional value.
In a microwave oven, broccoli loses as much as 70-80% of certain nutrients. With a pressure cooker, you preserve virtually all the nutrition and taste of your ingredients. Once you have cooked in a pressure cooker, it will be very difficult then to cook in an ordinary saucepan.