Just installed Darkbursts into an '03 Gibson Les Paul Historic Goldtop R7 and this thing sounds unbelievable!! Like PAF's only bigger with slightly rolled off upper highs - PERFECT for a Marshall and great for hard rock. With an amp with decent gain, metal should not be out of the question. They have a certain midrange punch to them, but not so much as to make them syrupy like a Rio BBQ. No muddiness on the neck and it can be used for chording, unlike Duncan 59s that can get too thick. Great middle position. Bridge barks with authority without being ear piercing. Absolutely *Driving* tone. String separation is quite apparent and I found them easy to adjust. AND, these things bloom like crazy with harmonic content, even though they are potted and don't squeal. Prior pickups in this guitar: Tim's Ed A, Rolph 59s, Voodoo 59s, BurstBuckers #1/#2, 57 Classics, Thanks Jim!