Went to the Union at 6:30pm today, and was told there was over an hour wait. I got lucky and was able to get a table in the upstairs area (which was open seating, but was still packed). I only stayed for a couple drinks and a snack (chicken nachos), but I had a great expeirence while there, and definitely would like to go back for dinner/brunch sometime.
Afterwards, I walked around the Union a bit and nabbed a quick picture of the Tom Thumb (see above). For some reason, I thought the plaza area in the middle was going to be bigger than it actually was. It wasn't small, by any means, but they had a smallish patch of grass in the middle, which I felt was a little awkward. Perhaps it's there as a convenience for people with dogs? I felt like the grass area was so small to the point where it would have been better to just make it all concrete and add more seating so people can hang out in the plaza.
I'm really excited to see the Union come to completion as I think it'll really be a popular area once all the retail is filled out. I saw the signs for Tom Thumb, North Italia, the Taco place, and there were also signs for a Sushi place which I was not aware of until today. Anyway, just wanted to share my experience.