I know that Joe did some interesting posts on United MileagePlus that appeal to my travel hacking instincts... But I've never really bothered with UA, mostly because of the crushing devaluations of 4-5 years ago and the fact that I've had better programmes occupying my mind. But now I find myself rather light on Star Alliance miles, even though I have lots of Alaska / AA / Avios, etc. And of course I'm tempted by one last Marriott Travel Package. But since I have more than enough AS miles for 2-3 First Class tickets to Asia, do I really need another 120K? Diversifying into more Star Alliance possibilities could make sense. But I'm nervous about dropping 132K miles into a programme I've never used. Thoughts?