So I've got the HFH in the neck of my main ride, a long-tenon set neck mahogany/maple carved top double cutaway. The guitar is warm but bright if you can imagine. Woody, sharp, complex.
I'm here to tell you, the last word I would use for this pickup is "transparent" (and this is not my first go round with the HFH). Transparent, to me, means the sound of your guitar's wood comes through. By contrast, HFH makes HFH come through. It took all my guitar's hard earned harmonic complexity, bound it, gagged it, and shoved it in a closet where no one could hear it cry for escape.
Despite the low resistance (5.89Kohm- single coil range), the effect of the pickup is very compressed. Notes do not evolve harmonically after the attack- not at ALL. For some, this might be a good thing. If you want absolute evenness between your notes, and have decent technique, this will be a good pickup for you. But for me, the effect is an extremely focused midrange voice that is absolutely flat, No maturation in the tone as the note sustains, with an extremely loud and again compressed highest frequency range - in other words, your pick attack comes through like a freshly sharpened axe slamming into a steel plate. Soften your attack? CLANG. Change pick angle? CLANG. You follow. It's extremely consistent in that piercing high end click.
So even in spite of its brightness, it's actually a fairly forgiving pickup if your right hand technique is lacking. I am hating it at the moment because I want my electrics to respond like acoustics - I want my hands in charge, and with this pick up I feel like whatever I put into it comes out exactly the same.
I've been guilty of yanking a pickup impulsively, so I'm going to give it a chance. But I had to chime in not for the sake of bashing it, but because I think there's a shortage of critical listening based feedback on this pickup, and a surplus of opinions based on previous reviews and party line noise. That said, it does what it is described to do. There is something strat like about it, although without the scooped midrange, and sweetness of a strat neck pup. It is bright as hell. I have no idea how John Petrucci used the Tone Zone / Humbucker from Hell combination live, since EQing one to sound its best yields the worst possible settings for the other.
I'd love more feedback.