Very frustrating, poorly designed app. This is the third or fourth time I've installed and uninstalled this app over past three years. I have wasted hours (seriously) trying to use it. This time around it won't recognize postal code or email. Surely, Costco can do better than this! Costco seems to be losing it's edge, from things like the app, their return policy changes, the unfriendly tire center and the quality of many of the products carried. Was there a change in management??