Great purchase
I've been using this only one day, and what a difference a day makes!  I can immediately tell that pressure points are now evenly distributed on my "backside," and thus the mild sciatica I was experience after longer "sits" is alleviated.  You also sit a tad higher, of course, and thus a little straighter.  I cannot speak to how this will hold up over time, but based on what I've read this thing holds up quite well.  I don't often go for a long drive, but when I do it's usually Phoenix to somewhere in SoCal, and that's 5-6 hours of driving.  The tail area always ends up getting fatigued, which means I get fatigued, too.  I have found the solution.  If you're wondering if you should buy this or not, do it.
Rating: 5 stars