I'm sure this was a very unique situation and won't be applicable to most people. We signed up for this tour the day-of, after a DIFFERENT craft beer tour cancelled on us. We booked a tour in English, expecting to be part of a small group. Ultimately, the group ended up being the the two of us as well as 14 Germans who were all traveling together!
So, the tour was mainly in German, with the guide then translating things to us after-the-fact in English. We get much info about the breweries or the beers beyond the bare minimum, but I think this was due to the unique nature of this tour. The germans were ready to party, and I don't think they had much interest in the intricacies of craft beer or the breweries haha.
Patrick, our guide, was very friendly, personable, accommodating, and attentive. He didn't give much explanation about the bars and the beers, but of course was happy to answer any questions we had. Again, I think this is only due to the fact that the German group we were with was pretty much "self-sufficient" - they were having a fun time together getting drunk and weren't too concerned with the details. This should not be a reflection on the tour guide, I think he did his best in the situation. Him being multilingual (Slovakian, German, English) was very beneficial here, obviously.
Ultimately, we had a fun time. The Germans pretty quickly opened up and most were able to hold conversations in English. The beers were tasty, and we had delicious and plentiful food at the final bar. Also, we pretty much had unlimited beer at the final bar - true to the description of this tour! At times it felt isolating, being the only English speakers and not knowing German. We were lucky though, because I imagine that if we were with a different group (people who didn't speak English at all) it would have been a very disappointing experience. I was hoping for a more educational experience, learning about beer styles and customs, cultural relevance, brewing process etc.