I know that this dead horse may have been beaten before, and Randy has a nervous tic when people discuss it, but I'm looking for recommendations of miles/ticket brokers.

My situation: I've got 200k miles on United, which I have had NO luck trying to use, even as a PremEx. I just don't have the flexibility to book seats a month out and fly on a Wednesday morning. Since I am also planning to shift all my business to American, I don't care if The Friendly Skies get upset with me.

Has anyone used any of the services (AwardTraveler, etc) and can give recommendations? Thanks.