I have been a fan of OMB since it's inception - Copper is my favorite beer and I was extremely disappointed when Total Wine stopped the large growler exchange. I have mixed feeling about the size of crowds at OMB - I love to see a busy place, but I miss the intimacy of the brewery when it originally opened and we would be one of the few in the brew house, instead of one of the masses.
Copper is an excellent beer, one that is close to what I had in Düsseldorf a decade ago - rich, malty, and so smooth you just keep drinking and drinking till you realize your future self will be mad at you for the headache. Captn Jack and the other beers are just mediocre - though the Dunkel and Hornets Nest are pretty good.
Our last visit was during the Christmas market, and if you can get over the horde of people, it was well setup with lots of options and stands that were not just junk.
As long as Copper keeps being brewed and tasting the same, I will keep drinking it!