Housekeeping is very lacking!
Stayed at this Marriott as it was downtown Detroit and close to a friends wedding. Views were awesome! Room is dated and rather small. Valet was a joke as you could call "at your service" but they didn't forward the request so waited extra 20 minutes for auto. 
Housekeeping was horrible! Left room at 9:00 am and came back at 4:30 pm, room was not yet touched. We were in a hurry to get showered and to wedding so we met housekeeper in hall for towels. Left our soiled towels in hall for housekeeper to pick up after we got towels. They layed in the hallway for 3 Days!!!!! Also stole my wife's jean jacket left in the room when they did manage to clean our room. 
I'm an avid Marriott client with a gold elite status and this is the worst hotel I have stayed at in their many chains. 
Stay somewhere else in Detroit.