Looks excellent. More space than AGDQ, free 24/7 shuttle, shuttle to surrounding restaurants, and the conference rooms are covered (thanks to DWB). THE HYPE IS REAL.
Sounds great, shuttle service is always a plus because rental cars are absurdly expensive for anyone under 25 (I just spent like $700 for one when I was on vacation back home, $250 for fees just being under 25).
What would the transportation to the hotel from Union Station be like? Or should I just expect to take a taxi or some sort of public transit?
It's about 13 miles, I wouldn't count on a ride but you might be able to convince somebody to do so. There is a bus route (AF) that would get you reasonably close, but since it's meant to be an airport Route it's more expensive than a normal bus ride.
want to throw in a reminder to check if the main bathrooms have hot water. it was the only thing that wasn't good about the hotel at AGDQ, though it wasn't (and still isn't) a big issue