I did it last week. I was just going to order a "regular" one but the patron next to me suggested I go with the maple syrup and cherry bitters.
It was cool. You got a sheet with 5 different whiskeys, 5 different syrups, and 5 different bitters options. The creation I made was good. Not necessarily better or worse than a "regular" Old Fashioned but I liked it! I honestly can't remember all the different choices.