Zahl HM1 Review - How good is an $8000 headphone amp?

[GDHAL]

I've always believed this fellow has the best (as in most honest and accurate) reviews of any product. 
https://goldensound.audio/

Check out his video about the Zahl HM1 headphone amp. Custom/hand made. 8 grand and more than a one year wait. It's worth watching the video even if you're not interested in headphones. 

https://www.youtube.com/watch?v=iEMUAb1FNpo&t=336s

Best.

Hal