My husband and I will be taking a flight from EZE>MIA later this month. We're currently in Business on a 1st/Biz MileSaaver award, which is great. However, I noticed that that 1st class on this flight is the premiere flagship international first, which I've heard is fantastic. I didn't think it was possible, but spoke to AA customer service, and she said for 12.5k miles each, we could upgrade that leg from Business to First. Is this worthwhile? I don't have any additional AA travel planned soon, but not sure if it's worth it to "waste" the miles. On the other hand, 9 hours in a flagship suite sounds pretty tempting! Thanks for your advice!