Not happy with my experience
We arrived and were told that there were no more double bed rooms available, although that was what we'd reserved. No concessions made for us having to share a bed. The registration line is always long, so the process needs to be streamlined.
The hotel walls and doors are thin. You can hear EVERY noise made in the hallway, including the loud housekeepers that start rounds at 8am. 
The room was not very clean and could use updates. The sheets and towels are dingy and smell strange. I left some clothing in the room by accident and no one seems to be able to locate it. 
Overall, the only thing that I enjoyed about this hotel was its location and the neat train station layout, but there are so many other hotels in this area, I would not recommend paying the money to stay at Crowne Plaza Downtown Union Station.