I've been to HH once. Food was pretty damn good and I have no complaints about the service I received. I never went back though mostly because its out of the way for me and I don't feel like driving a long distance to eat in a crowded hot basement full of hipsters.
A lot of people in this city act like this is the best restaurant to ever grace Louisville...its not. I mean hey if eating in a dive with rude service if your thing...by all means eat there every night. I just don't necessarily think it would be the first place that comes to mind when someone from out of town asks where to eat. Its definitely unique. I would say if you are hitting 10 places maybe give it a try, but if you are only hitting a couple, I'd pass.