收到chase的mail,说可以把我的credit card upgrade到prestige credit card

列了一堆的好处,例如20%discount off restaurant meals啊

5% cash back on hotels, car rentals. domestic airline tickets啊

protection for all your credit cards( typically $24 a year, but it's yours at no cost)

有没有人用过这个,来说说值得划算吗