Wow--thank you for the quick info.

On a related sidenote, I'm redeeming HHonors points for my stay at the Paddington Hilton. The Hilton Waldorf is also available for the same amount of points, but think I would be defeating the purpose of being right there in the morning to get the train. My LHR-ORD flight is at 0935. Do you think the Waldorf is that much better despite the added inconvenience? Is the area around the Paddington Hilton dodgy at all? I'm not too familiar with that area.