Has anyone used a Crank Bros Joplin Adjustable Seatpost - can you share your experience?

http://www.crankbrothers.com/seatposts.php

I'm thinking of getting one of these for my Spesh Enduro Pro. I like the idea of a remote adjustable seatpost ...as it's a bit of a pain to stop and adjust my extended seatpost every time for a descent.