I was at Doubletree downtown for a conference for four days. It's an old building but not in a "cool" old building kind of way.
Pros:
The staff is very friendly and very helpful in every department - front desk, banquet servers, shuttle drivers, breakfast servers at Stadium.
The room and bathroom were clean and the bed was super comfy - love the pillows!
Free shuttle service to take you around downtown and pick you up.
Starbucks in the lobby.
Cons:
The room was very small and cramped. Queen bed, dresser/TV stand, armoire/closet, desk. Seriously barely room to move around.
The volume on the TV kept going out so I would have to turn it off and on to get it back.
We used their banquet rooms for work sessions and meals: food was bad. Bad. Bad. Various meals: the chicken for the fajitas was gray and cold; chicken monaco was ice cold; steak was way over cooked and cold.
Sound system kept going in and out.
Staff was great, bed was cozy - nothing much else.