Camtasia or Jing - any users here?

I've just downloaded the free version of Jing to use in my classroom. It looks promising. I'll probably upgrade to pro and maybe purchase Camtasia Studio with an educational discount.

Anyone here using these? If so, what applications are you using it for?

Thanks in advance.

http://www.jingproject.com/

http://www.techsmith.com/camtasia.asp