My own thoughts about BGGA:
He was the first reviewer that consistently gave us both the music used and the sonic queues that he was searching for to gauge, SQ, treble, mids and bass and how he likes to hear his music.
I find this helpful as it allows for individuals to use their own existing equipment to assess how you hear compared to what he is describing. That gives you a level playing field.
Both BGGA and Zeos hype equipment, and my take is that it's from a love of music and equipment that they really like, they hype.
I trust BGGA's ears, though some things that he has recommended haven't been life altering many have been very, very good to excellent. I consider BGGA, within the framework of not knowing him IRL, a friend in the world of music and gear.
But obviously hearing is different for different people and any individuals mileage may vary.
Long story short, having spent time to understand what he listens to and what queues he uses to evaluate sound reproduction can help you understand whether or not how you hear aligns with the tuning of a piece of equipment.