Sanders' Plastic Keg Thingy - Any Experience?

[SpillsMostOfIt]

I'm not yet of a mind to get into kegging - bottling is a great way to get a cheap variety of beers, and I really don't have the space.

However... There are times when it would be really kewl on occassion to have a backpack beer keg like this: http://oz.craftbrewer.org/Library/Gear/ ... Kegs.shtml

A bit like a wandering minstrel except more welcome...

Anyone got any experience, ideas, etc?