I'm not sure how that works James but it seems gimmicky to me.  If you were soldering the same components all the time, it may work.  But to effectively solder, you hold the iron on one side of the components being joined and the solder on the opposite side so I'm not sure how well that would work.  Plus something that big and bulky is hard to use for small components like on a circuit board.  I think in the long run you'd be a lot happier with something like Ryan bought.