Soix responded.
Are they worth it - meaning - Are they a good buy, sound quality for the cost?
“This totally depends on what specific improvements you’re looking for and what sound characteristics are most important to you.”
I would respectfully disagree with this assessment. This takes you 1/2 way down the road. If the equipment is not reliable and the maker is not very responsive, would one still want the chosen audio equipment? If the cost goes up considerably because of shipping it back to the manufacturer then that cost adds up. And if it needs fixed? More costs. What if you need to resell it at a loss? More costs. I found out the hard way to dig deeper with my research.