Might work might not – MGM Rewards Review

The app saved me an hour at the registration desk. It only works 1 of 10 in the elevator. Take your chances and hope that someone on your floor is headed down. Also chose the green option during checkin. It didn’t register and I had maid service that I didn’t want. The front desk said the setting was never selected during check-in.
Review by ASUCapMor on MGM Rewards.