Vector Post Driver

[Ben H]

Has anyone had experience with a Vector (Ireland) Post Driver? I'm wondering how they compare to a King Hitter (New Zealand).

http://www.kencove.com/fence/Vector+Post+Drivers_product.php

There's also a few videos on YouTube. Looks like the same idea as King hitter, a falling weight versus stretching springs like the Worksaver/Shaver.