I just did the Amex -> CO -> Amtrak -> UA conversion. Works great. Did the first Amex -> CO transfer on Jul 2nd. CO -> Amtrak also completed on July 2nd. Amtrak -> UA completed today July 8th. 6 days total for 25000 Amex MR points to become 25000 UA miles. Only cost incurred was $10 to Amex for the transfer to CO. They don't do it free. They charge .004 cents per point transferred so 25000 points is $10. Well worth it if you ask me. Too bad can only do 25000 because of Amtraks limitation. Yes I know if you have a certain level in Amtraks program you can do 50000.

WORKS GREAT!!!!!