Although quite expensive surely this would remove the need for any starter foo-fah (i've seen yeast pitching rates requiring up to 1.2 gallons for a 5 gallon batch of lager

Its actually not a bad price when you compare it with the price of liquid yeasts and if you were to buy the corresponding amount of yeast in the normal 12g sachets you'd be talking about £14.
Has anybody bought and tried one of the big 100g sachets?