Molded Tyre inserts-yay or nay?

I have been using them in my buggies and truggy. In the buggy they seem pretty good. They are supposed to tougher than the old foam style. The old style in the past I've had tear and then break down on me, kinda sucks when that happens. I never realized that the Monster size is heavier until you mentioned it. The one thing I have noticed is that I have the medium and they seem a little stiff not bad though. As far as ballooning goes, to me it seems like they balloon less.

I've never taped any of my tires but maybe I should if increases the foam insert's life.