Magnificent? Only by name
I went to Chicago to run the Half Marathon and as Marriott Reward Member I was very excited to find a Magnificent Marriott very close by where I needed to be. What a mistake!
The hotel is nothing similar to magnificent. The service is very bad, the first day my room was never made! I arrived back to my room around 4pm and it was still undone, I called housekeeping and they said they will send someone, that person arrived 2 hours later.. by 6pm I didnt want to have ANYONE in my room. 
My minibar was empty, and i do not remember getting asked if that was my choice. 
Given that I was going to run the marathon I asked them if they were going to have a special breakfast for the runners, and the answer was no. I asked the if I could then have an early breakfast, around 4am... the answer was also negative. 
The hotel is old, terrible service and I didnt feel they cared about anything. And it has a lack of details, such as a ramp in case you enter the hotel from the magnificent mile... you have to carry your bag down the stairs with no help ofcourse. 
The hotel is perfectly located, but i think a travelodge service would be better! So look for something else.