This humhucker sounds great!
Not just for heavy music, it offers great tones for bluesy rock, and at mid-gain settings.
It has a lot of clarity and with the knob turned down you get a lot of warmth, so it is also suitable for cleans.
I gave it 4 stars, because it includes the mounting frame but not the screws for it. Very cheap and annoying not to include 4 additional screws.