My wife and I were platinum members at the old Starwood and regretted the change with Marriott. Worst possible web site and mobile app. Every time I try to sign in I get the error message. I know my email and member number are correct as I get frequent emails wanting me to buy points. So it's a password issue and updating your password is an excruciating experience. However, with an hour of spare time and infinite patience it is possible. However, once I get signed in and complete my transactions, I will go through exactly the same experience the next time I try to sign in. Their hotels are excellent but boy the customer service on their apps is extremely frustrating. So, I am done with Marriott and will sign up with another high end chain like Hilton hopefully with better customer service.