I've done about 40klm on mine and so far so good. As we all know, the big test comes with the big ride.
Here's a photo for those that are interested.
I'm actually pretty excited though cos in my case I have found a really bad problem with the Corbin backrest and how it anchors in the seat. Basically, there is only about a 1/4" between my tail bone and this post so after an hour of riding, it starts to get really (I mean really) uncomfortable.
My bet is the airhawk which has some great raves over here will do the trick quite nicely
