They say on the web site it's based on an unreleased beer called Honker’s Deluxe. It's a very nice ESB, with good malt and hops balance and a little sweetness in the finish. It left me in the mind of fresh Fuller's ESB, but with a little more alcohol and carbonation. I will buy more while it's available.
I'm not sure if this is only a local thing or if it will get wider distribution than the Chicago area. I've seen complaints on some rating sites that they didn't do some big stout/Belgian thing, but this is a tribute to the beers that inspired John Hall to open a brewpub back in 1988, when that was a pretty risky move.