If your pressure cooker is aluminum, don't use it for cooking, as the metal can leach into the food, especially with acidic foods (tomato based stuff, etc). I got rid of all my aluminum pans long ago, when the metal was linked to Alzheimer's.
I cook brown rice just about every week, in bone broth. I have a recipe card box of IP recipes that I really like. I made the best ever beef stew in it. Pressure cooking is great for long, slow, moist cooking. It make the long and slow not so long.
I've read it's a good way to cook tough old chickens when they go to freezer camp.