I've probably put in ~30 games on location at one of our local breweries and I really feel that the game is just beginning to unfold for me. I still haven't settled on a strategy for what stein/tent combo to start out with - I've been going with "easier to collect TENT letters" just because the game feels like it has a bit of a dead zone when your tent modes aren't qualified. Reminds me a little of Ghostbusters if you don't have a mode ready to go. And then usually starting out with Juggling or Chugging as my tent mode and let it unfold from there.
Still haven't started a keg multiball because of that damn side ramp but I've seen the duck frenzy one and managed to have an insane Corkscrew multiball with all of jackpot steins stacked going into the multiball. Hit a few of the triple super jackpots (great callout btw) and the multiball itself ended up getting me well over 7,000,000. I had to do a double take after it ended because I couldn't believe it lol.
As far as theme goes. Its perfect for a brewery. I'm seeing TONS of people of all ages instantly attracted to the machine because it just seems to make sense in a brewery setting. The music and callouts start to get a little repetitive so it might be nice to see some additions because in my experience its a long playing game and there is only so much oom-pah-pah a person can take.
If any API folks are reading this... speaking with the owner of the brewery we started talking about how cool it would have been if there was a way they could have inserted their logo into the keg or tap handle that is on the backglass. Just a simple blank space that could be filled with a generic Oktoberfest logo or could be taken out and a custom logo could be slid in by the owner. Seems like a relatively simple option if it was though about early in the creative process and it would add a TON of customization to the game.