Loud, Dingy and just kind of Cheap
I booked the Sheraton City Center via Hotwire for a fairly cheap rate ($90 or so a night). We arrived at the hotel where we were given the option to self park in an underground garage for valet for $29 plus tax each night. Kind of pricey, but not terribly uncommon for downtown city hotels. 
The hotel is on the older side, which again was fine. We were sent to our rooms up the 19th floor of the South Tower. The elevators were dinged up, as though someone had whacked the walls with a ball bat. Our room was large, but kind of grimy. The rugs were mangy, the windows were filthy and the rooms we *loud*. It's always alarming when there is a set of earplugs on your table with an apology note from the staff. Even on the 19th floor, we could easily here cars horns, sirens, loud conversations and the relentless construction across the street. Even worse, every door on our floor that opened and closed and every person talking in the halls could be heard as if they were laying beside you in bed. Not to mention that our refrigerator didn't work. As an added bonus, despite a "DO NOT DISTURB SIGN" on our door, the room cleaning staff knocked on our door on *three seperate occasion prior to 9 am*. This is just inexcusable. 
I'm not the world's pickiest hotel person...far from it. If it's clean and quiet, then it's fine by me. But when a hotel is loud, dingy and the employees who treat you with low-grade hostility, it's not the type of place I would ever return to. It's hard to believe this hotel has the Sheraton logo attached to it, as it is certainly the worst of the bunch.