A fine hotel
I stayed at this hotel 2 nights for a work conference, and I generally agree with most posts on the website. Quick summary of the experience below....
Location - I'd rate as very good. River view was nice. Decent walk to most interesting Chicago sights, restaurants, etc.
Lobby - nicely appointed, handled the multitude of conference attendees wandering around quite fine. Lobby bar was decent, with a nice view of the river.
Room - very standard. I found the bed a little too firm, and I like firmer beds. The bathroom was very tired and beaten. I was surprised at low quality amenities & towels found in the bathroom for a decent Sheraton hotel. Noise level from the street and between rooms was non-existant, but from the hallway was noticeable due to thin doors. Found popcorn on the carpet when I checked in, not a huge deal but makes me question the quality of the cleaning staff. 
Other - staff was generally friendly
Would I stay again? For work...likely. For personal...likely not, unless on sale!