I think the pickups are perfectly good, but the preamp is just ok.
I agree. The pre amp is nothing special. The pups without the pre amp sound better in my opinion. My only bitch with the pups is the magnetic range is not so hot. Meaning if you make all the strings the same height over the arc of the fretboard the two center strings have a lower volume than the outer two. And as far as I know the pups are sealed so there is no way of bringing the poll pieces up a bit to balance the output from string to string. Too bad. Other wise the tone is cool. Kind of high end crispiness.
I may rip it all out and start from scratch. Haven't played them enough quite yet on my new Lakland. Still tweaking.