I bought these PU's for a Jackson JS32-7Q and the amount of tone and clarity, especially from lower tunings is a huge improvement compared to the stock pickups.
While they are very high output pickups, they do clean up nicely when you back-off the volume. You can also get some more variation to the sounds by wiring the in-between-positions of the 5-way switch to for example inner and outer coils which are good for cleaner tones.
I really don't have anything bad to say about these. After checking out demos in youtube, the sound was pretty much what I excepted it to be.