Small and very noisy- would not come back
I stayed here for one night for business and definitely would not go back. I have stayed in many of the hotels on Michigan Ave and this one was by far the worst- the 4 star rating is a joke. It is a 2 star hotel. 
The room was incredibly small as was the bed. The width of the room was actually the head of the bed to the foot of the bed so it was incredibly cramped, and the bed was not all that comfortable. The desk was very small and there was no coffee maker. Also no shelf space in the bathroom and no view (though that can be typical on Michigan Ave). I was so glad I was only staying for one night. 
Also, when I had arrived, it took forever for the elevators to take you to your floor- they are small and narrow. When I got off the elevator, there were 6 huge bags of garbage sitting in the hallway (great first impression).
The worst part of the visit was how loud it was in my room. The AC was incredibly loud as others have commented, but even worse, was the sound of the pipes whenever people around you/above you flushed the toilet. The pipes would make this incredibly loud sound that sounded like the beginning of a siren about every 10-30 minutes (depending on how often someone was using the bathroom around you). Between that and the A/C, I had a terrible night sleep.