Its good, but not perfect
I have a broken tailbone, and not much helps it.  Saw this, thought I'd give it a try.<br />First of all, there is a disclaimer about how it might be damaged if used while at a high temperature, which is where it would be if left in the car during a hot summer day.  That was kinda my plan. I will say it hasn't been damaged, but its cooler now and hasn't been through more than a handful of hot days.<br />Without the cushion I might last 1-2 hours before I have to just get out and walk around.  I will say that although I didn't expect this to be perfect, I can go 2-4 hours on it before I need a break.  It does work and provides comfort and support.  Doesn't slide around in the seat when I get in and out as well.<br />All in all, a good purchase. I'm betting most of you will have better comfort than I, but I'm doomed to not ever be 100% comfortable on it.
Rating: 4 stars