I use this pickup in a 27" ash bodied guitar, rosewood fretboard and maple neck.
When I bought this pickup some years back, I was really into meshuggah and wanted my guitar to sound like they do, and this pickup really does that! very loud, very focused. It doesn't have a lot of bass response, so trying to make it work for more regular music can be difficult (it gets thin, honestly) but that could also be the slight mid-scoop from the ash wood, it's probably different in a mahogany body 8 string.
I installed it with a coil tap to get some versatility, which it does great. I actually wanted to put a bareknuckle warpig in there, but Fred Brum recommended me the dimarzio instead for the better coil tap sound. He was right!
Good things:
-Tight, good crunch
-Not as expensive as other 8 string pickups
-Great coil tap sound!
Bad things:
-Doesn't really work with old school styles
-Overloads preamps easily, hard to get a totally clean sound outside of coil tap
If you like djent or contemporary metal guitar sound, I'd definitely recommend this pickup if you don't feel like paying for a bareknuckle or newer 8 string models.