Location not great
Like other reviewers on this site, I felt misled about the location. Otherwise the hotel is fine. Not great, but clean and fresh and welcoming.
As a frequent traveler to Chicago's Midway Airport, I needed to find a hotel closer to the L train. The only one I found was the Carlton Inn Midway. This is where I stay now, and the L train is just a 3 minute walk away.
I wouldn't stay at the Hilton Garden again, unless it was just for a layover. It isn't even in Chicago, by the way, it is in Bedford Park.