Double Tree by Hilton Dallas - Market Center

Unbelievably unaccommodating and unclean. Hall ways smelled and previously used glasses left in room.I have a surgically repaired knee and needed to stay 1/4 mile away at another Hilton property (Anatole)where all my meetings were being held. The Double Tree Manager would not let me change my reservation because I was within the 72 hour deadline. Manager said he would HAVE to charge me an extra night even though I was going to pay more at the Hilton Anatole. After I persisted, he all of sudden had the power to only charge me HALF a night's stay. I stayed at the Double Tree and for two days I walked to my meetings. I flew home with an extremely swollen knee. Do NOT Stay at the Double Tree Dallas - Market Center!