I thought I'd throw these comparison pics up.
Left hand side is stock glass from Stern, Right hand is Invisiglass
The immediate effect that it gives when you swap it over is noticeable. Other then seeing the switch over in person I don't know how often I'd notice. You do get the sensation that you can "see through" the glass.
The last side-by-side shot of xmen, lower right corner glare is the most noticeable difference in the photos.
I bought three panes, two standard, one wide body. Packaging / Shipping from JJP was top notch.
Worth it? I think so.
First thing to mod on your pin? Meh, probably not.
Will I buy again? Yes.