It's a good program, IMHO, especially for FREE UG's, if you typically pay full fare Y - which I like to avoid!
http://www.flyertalk.com/forum/wink.gif
Biggest problem I've had with them is booking reward travel where and when I want to go - even in economy.
Also, the hours of the Aviators center, unless recently expanded, are kind of like your local bank- only worse!
http://www.flyertalk.com/forum/frown.gif