Transferred Amex to Asiamiles this morning, was instant (no need to log out or log back into Asiamiles). Had desired reservation up, when I initially clicked button to reserve, before AMEX transfer, was given the message that I did not have enough miles. Then transferred from AMEX, immediately clicked the reserve button again as soon as AMEX confirmed transfer, and this time it took me to the passenger detail and payment pages. Was instant and was my first time transferring.