I appreciate Doubletree for its frequent low rates, and often full breakfast for Diamonds/Golds. That said, some of these properties are dated, shabby, weird and/or sprawling. Two examples: the Doubletree Denver (a feel of abandonment) and the Doubletree Times Square (security check at the entrance: non-residents barred. Lobby is deathly quiet and absolutely nothing's happening anywhere in the hotel. A complete contrast to the joy of Times Square). Some Doubletrees are fine, like SFO.