Beautiful clean tones.
Engaging, dynamic and warm. They're very reactive to your picking hand and feel very organic.
All the tonal spectrum is controlled, the highs are omnipresent but soothing, the mid-range is exciting and and the lows are super tight, punchy and controlled.
Even though these pickups can sound good with blues and hard rock they will definitely not give you a vintage or hot-vintage sound. Yes, playing a distorted E open chord in E standard with the bridge pickup sounds great and the note separation is remarkable but if you're looking for a "Brown" sound or a non modern sound, these pickups might not be your best choice. One negative thing (subjective) that I found on them is that the bridge pickup will quickly over-driven your clean amp if you strum/pick harder.
The Bare Knuckle Juggernaut are amazing pickups that make chords and lead playing sound clear and harmonically rich, albeit there is something about them that puts me off. I think I like them with high-gain and clean tones but not so much with an over-driven tone. They have a roar of their own.
Nevertheless, because they are so great I still have them on my guitar, thinking their sound and touch might grow on me, eventually.
If you're a modern player, definitely consider these pickups, if you're not looking for a modern sound, these might not be your best option.
The Juggernaut might not have that vintage nor vintage-hot mojo but for modern players/pickups, they stand on the top of the pyramid.