Just stayed here 3 nights for work. Stayed at the Graves etc but the room they gave me on the 18th Exec floor was massive! More like an apartment with a GREAT view of the city. Had a lot of facilities and found the bed to be really comfortable with very large pillows (just what I like). Wireless is strong, free and fast for a diamond HH member, good tv, lots of choice. Shower was great with a separate rain shower spout. Room service was great too.
My tip would be with the car park. My GPS took me to the front of the building where there's no pull-in or drop-off point so I continued round the block looking. There's a car park to the left of the front of the IDS center where you'll see the sign - don't get it confused with the numerous public ones close by. The hotel then gives you a pass to come and go as much as you like which I loved as I HATE valet. Bonus is it's a reasonable $20 a day for a well lit, clean, spacious car park.
Would definitely stay here again, the local is excellent. It's up the road from the Hilton which is also lovely but Hilton uses valet service.