I have recorded with the ISCHELL pickup direct without a mic and effects, so you can hear the pickup by itself without the acoustic sound.I use the DI out from my EAR compact mobile 60, because this is the sound if you go to a PA system trough your AER.
It is very naked, but this way you can hear it by itself.
I think it is a very nice sounding contact pickup. Very natural for this kind of pickup, very feedback resistance.
P.S. :to read more about this test, go to the Facebook group "gypsyjazz".
Off course you can become a member of this group :-)