Let us know how the silicon grip works out in your cue case. I'm curious if over time, it will try to collect pilings from the cloth cue case.
The silicon grip is great. In my estimation the non-slip grip helps preven the shooter from tightening his grip through the stroke, lessening the possibility of miscue.
I have a new Instroke case and the cue does drag some when pulling it out, but nothing to be concerned about. As for debris accumulation on the grip, I have had no problems yet and would imagine that it can be cleaned, much like a golf club grip, with a soft brush and soapy water.
This cue hits hard with little effort.