I have never used the live wire.. It seems like a great idea. In your situtation I can definitely see it being useful.
The only thing I would worry about is the integrety of the mechanics year in and year out. I have a HSS and I like that the tether is easy to inspect and after 5 years.. its time to get a new one.
Hopefully you get some other responses.. I am interested to see what other people have to say about it.