I wanted to get these a year or 2 ago but ended up getting the Ride Jackson instead....I cant remember if there was any dampening in the Insanos but I know it was just a regular insole in my Jacksons. The Intuition liner they use in all their boots are the shit though and make for a really comfy ride. Ive never had any problems off jumps or cliffs with them. I cant really give feedback on the stock insole either because I replaced them with Superfeet before I even left the shop. Awesome boots though, Im sure the Insanos are great too.
BTW im sure you know if you have tried them on but the Insano is a crazy stiff boot...not sure what your riding style is like so wanted to make sure you were aware.