I have already two of those… makes life so much easier…
Wouldn’t know how to do all those beer-line-cleaning jobs… and so much fun to work with.
Not to mention, carbonating all those bottles of tap-water… delicious.
And filling the odd bottle of beer/cider to take away… marvellous. http://www.brewshop.co.nz/kegging/carbonation-line-cleaning-cap.html