Pick the ones with cracks and no obvious dark color. If there are no cracks, it means they are not ripe, so peel them yourself. You can eat, is the texture will show hard, not cooked so glutinous, and no durian unique kind of fragrant odor. Durian has a wine flavor means that spoiled, can not eat, eat will have a hangover feeling. If you eat too much durian, eat a few mangosteen. ps: durian in the supermarket will have a special staff peeling, pick and let him peel it. So prickly, but also their own hold home.