I wasn't going to bother reviewing these but the difference is so astonishing I really feel I must.
My two guitars are a Jackson SL3 and PRS SE Custom 24 and I've put BKP 550k pots in both with Jensen BKP 0.022 caps. The first thing you notice is the size of the caps; they're HUGE. Compared to the tiny caps that you usually get, this was like trying to install a can of Coke in the guitar but whatever it is that's in those things, it sure works. I also found the pots were a bit wider than the stock items on both guitars so I had to carefully file the holes a little larger so they'd fit.
What's Good?
I've heard this said before but I'll say it again here because it's absolutely accurate. It's like having a thick blanket taken off your rig when you fit these. Everything is so much clearer and more cutting than before, to the extent that I'm having to adjust all of my settings to accommodate the effect. Notes that may struggle before now really sing and for the first time I use the tone pot!! In the past, turning the tone down has always made some aspects of my tone a bit too muffled and 'dead' but now that simply isn't the case. Now I can solo on the neck pickup with the tone at zero and it's as clear as a bell anywhere on the neck. Awesome! Fitting this lot has also released a hell of a lot more volume. Because of the extra clarity, it really cuts through now and all of the controls are super-responsive. Before fitting these I always had my boost channel maxed out for solos to give me the extra volume I needed but the first time I hit the boost tonight, it damn near blew my head off!! I've had to almost half the amount of boost I'm getting.
What's Not?
The pots could be a bit smoother in their operation and it was a pain that I had to get a file out to my beautiful guitars so they'd fit but other than that I can't think of a thing.
Summary
Bare Knuckle pickups will drastically improve your guitars but honestly, until you install these pots and caps you're only hearing half what they're capable of. I swear to you, they're worth the expense and I really didn't expect to be this enthusiastic about them. Buy Bare Knuckle pickups and you'll wonder why you ever wasted time on Seymour Duncan, DiMarzio and EMG but install BKP pots and caps with your new pickups and your jaw will hit the floor in astonishment at just how good they sound.
Hope this helps and if you have any questions, I'll do my best to answer them.
