Very poor service
I stayed at the Doubletree Detroit-Dearborn for the second time this year and had a bad experience. The Doubletree brand is fairly tired and Hilton is not doing much to refresh the brand or its properties. 
I had a problem during a recent stay: I realized the night before a business meeting that my room lacked an ironing board. I like to iron my clothing which has become wrinkled in my suitcase before a meeting. I called down to the front desk requesting an ironing board. 30 minutes later, no ironing board. I called down again and was told that staff had been given the wrong room number. OK, not a huge problem, although I get the impression that my room number appears on the display at the front desk. My ironing board arrived 10 minutes later. 
Unfortunately, I failed to notice that there was also no iron in my room until the next morning. I had 30 minutes to shower and get ready to leave for a business meeting. Again I called the front desk requesting an iron. The desk personnel remembered that I called for an ironing board the previous night and promised to get me an iron. I didn't think it would be necessary for me to add that I needed the iron IMMEDIATELY. 30 minutes passed and I was out of the room wearing the wrinkled shirt to my very important meeting. I went to the front desk and related that this poor service was unacceptable. She offered me Honors points. I have not seen any points added to my account 24 hours later. 
Bottom line, I will find another hotel chain for my next trip to Detroit.