Worthless shuttle and outdated rooms, dull-eyed staff
Unbelievable experience at our most vulnerable moment...after 20 hours of international travel we use the terminal courtesy phone to contact the front desk to arrange the free shuttle we desperately needed after crossing 13 time zones. Told to wait under the "green sign", step outside and see many green signs but decide to wait...see Hilton and other shuttles driving by every 5 minutes, so why not wait like everyone else. 
15 minutes later, no shuttle. Call 6 times without answer, on the 7th the desk responded they "missed us" so we wait again having seen zero Radisson shuttles. Eventually we give up, after an hour, and take a taxi...becuase the front desk refuses to answer the phones, no matter whether we chose Operator or Concierge from the phone menu.
Front desk is a nightmare of other travelers angry about the shuttle service, all having ended up taking taxis themselves. The staff freely admit they changed companies recently and 'are worthless.' Turns out they use unmarked white vans, who apparently don't even stop at the terminals...how is ANYONE supposed to know a random white van driving by with the countless other cars/vans at one of the busiest airports in the US is for your hotel? We counted 12 trips by a Hilton van in the timeframe we were waiting. 
The staff pays out our taxi fair with petty cash, and only provides a modest credit to our stay after providing the number for the hotel manager who is not on duty. All in all we waste about 90 minutes just trying to get to the hotel, find the staff freely admitting a huge issue to an angry crowd, and spent all of four hours resting and stinking like diesel fumes from waiting outside the terminal so long.
Underwhelming rooms as well, with dated bathrooms and the smell of old smoke despite a non-smoking sign. It's impossible to give anything but a Terrible rating after such a rough introduction to the hotel. Only redeeming quality was the bed and the quietness, which may have been due to us not being able to check in until 1am after an 11pm arrival due to the shuttle. 
Maybe if you're just passing through on a short trip it's a decent place to stay, but you're most vulnerable after such a long trip and wholly dependent on the hotel shuttle taking you to your $150 room to rest...so I have to give it a low rating.