Very Poor in Terms of Doubletree standards
First the good news: The staff was very accomodating, checking my wife and I in at 11am (we were in town for a wedding), and they answered clearly any questions we had. 
The bad rating I give comes from the quality of the hotel itself. I did not see or use the pool or gym so I am unaware how those facilities look, however I know well how our room looked and was supplied:
1. The hallways are dated and not representative of the Doubletree brand (it looks like you're walking through a comfort inn, and an older one at that)
2. The room looks like it was last furnished and updated in the mid 90's.
3. No mini-fridge/microwave/or mini-bar, just a coffee maker with 2 coffees and 2 teas with sugar and half&half.
4. The bathroom was tiny and the toilet was crooked off its foundation by about 2 inches and banged against the wall if you even gently sat on it. 
5. Our room was the last one before the elevator bank and wow, you could hear everything in the elevator shafts through the walls (no soundproofing whatsoever).
6. Roomservice is BEYOND incompetent. The phone number they give you in the menus connects to the front desk, not the kitchen. After being transferred 4 times, the 4th person picked up the phone but did not respond for 2 minutes as i could hear staff conversations go on with no one picking up the phone to take my order, so I just hung up and went down to get lunch.
7. The parking garage is tiny, sketchy, doesnt take credit cards, and is dangerous with how tight the driving lane is.
Basically this place is falling apart and aside from the front desk the staff is not trained AT ALL in customer service or their job responsibilities. This hotel is not worth your money.