Ellery & Co are only open Saturdays, and today I have an opportunity to go. Located a little out of Hawthorn main (46 Church St), it is a quaint spot. Seemed rather small, though they mentioned that there are some seats beyond the bar. I did not have to venture beyond the front, as the section had a couple of seats available. The waiters were friendly from the get go, and Ellery & Co seemed to have a a very metro feel to it.
I ordered scrambled eggs with a side of hash browns and field mushrooms. A decent breakfast, but a little stock standard if anything. It seems like a place that you could expect consistent food, and a good casual atmosphere.
Give it a chance, I think you will like it.