Anyone had any experience (i.e. good luck)on long haul routes using the Star Alliance upgrades from any fare that came out recently to Star Alliance gold level members. I have a chance to use them on short haul in Europe but if people have had luck using them on Transatlantic and Australia routes on United (so I guess this doesn't apply to United members--I am Air Canada), I would be most interested and may save them for later this fall.