Nothing short of excellent! Have put it in bridge of US G&L Legacy and instead of usual thin bridge strat sound it gives rocking (AC/DC wise) tight crunch for power chords and fast bends. All without noise and retaining single coil clarity. Have used small JB before, but this is better sounding for me. Also retained G&L original PTB wiring, both treble and bass controls work just fine.
With Dimarzio Heavy Blues 2 in neck they make perfect combo for a classic rock strat.
Installation wise, I would prefer more substantial wires and and cloth for more professional look, but hey, its under pickguard :)