I have a pair of the Tonerider Alnico II pickups, that I was going to use instead of my B.K.P. Stormy Mondays - or Manhattans for my 'spare' Jazz guitar ; but they did not have enough detail / clarity / dynamics / 'air' in the sound for my needs. They were not harsh, just rather 2 dimensional . I play predominantly chord melody, and so they may be fine for overdriven Blues in a solid body guitar.
However ; I can honestly say that even my 'Hot to trot' B.K.P (Alnico V ) Warpigs, give me much more subtlety and dynamics ( when used for clean / detailed / mellow / smooth Jazz tones ) than the Tonerider AIIs.