jimmer0 wrote a review of Black Diamond O2 Telemark Binding on January 6, 2005
I've skied the O2, Targa, and 7TM and the O2 is by far my favorite. This binding adds a lot of power to your skiing!! The Targa and 7TM are much more neutral and you have to work a lot harder to put as much force into your back ski.
If you want a binding that makes tele-skiing easier, this is it!