In an upcoming story, we've been putting together a list of the absolute best feature of each frequent traveler and a list of the absolute worst feature of each program. Any of you care to comment on the best/worst features of each of your programs to compare with others?

I'll start: among the best features of the Mileage Plus program is the fact they don't charge you express redemption fees for awards like it seems all the other programs do. Forget that $35-75 stuff.