Anyone have the Kensington BungeeAir Case/Security Tether?

[neko-hun-jyata]

http://www.kensington.com/kensingto...wer-wireless-security-tether™-for-iphone.aspx

Interesting concept; they have a version without the battery too.

Wondering how the security tether operates in daily use and how much protection the case offers. Anyone able to comment?