My quick take on him:
He's a smart guy, been in the industry a long time, and knows a lot.
From what I've seen of his videos, he is often informative and helpful.
The gear he carries seems like very good stuff. I don't know how his customer service is.
He has a very loyal following, often willing to attack in youtube threads.
He himself is often snarky and supercilious. He markets his business on the back of the campaign, "The audio industry is lying to you but I can tell you how and why they do that -- and sell you gear."
His critiques are sometimes on-target, sometimes off-target, but his main tactic is to generate buzz by being snarky and presenting himself as a radical "truth to power" guy.
Surely, he's right some portion of the time -- about bad gear, bad marketing, hype, and the over-targeting of the super-rich in audio. But he does this in a way which makes him a hero to some and a villain to others.
That's my take after watching many videos and having some online exchanges with him.