After having the Hades Gates installed and playing it for several days now, I have a more comprehensive review. I like it. It's a great pickup. I don't love it. I am finding myself missing some of the thickness and output the Custom Custom provides.
The Hades Gates has a nice PAF vibe to it but feels like the heat has been turned up a notch past where the Pearly Gates is. It's got this cool "hollow" vibe to it that's very PAFish but has some nice mids as well. The guitar I put it in has a swamp ash body, maple neck and fretboard. It works and has a nice sparkle in the high end that sounds very nice. I imagine it would be a completely different animal in a mahogany body guitar like a Les Paul or similar. I am working on putting a video together like I did for the Custom Custom.