Hi Mike,
I totally recommend you DO IT
Seriously, just buy it and try it. Its $8....it wont be the best beer u have made, but it should be okay if your brewing methods are already producing drinkable beer.
Then do yourself a favour, for $11 odd dollars go and get a coopers premium can (not the white cans) from BIGW...they are more expensive elsewhere. These kits are much better. Mexican is pretty bland, Canadian blonde is my pick of that range, the Euro Lager is great, but it is best brewed colder eg 12deg and it takes 3months in the bottle, at least, to taste any good. The Pale Ale kit is pretty fine too...
For $3 more...that is about 5cents more per bottle (stubbies) or 10c more per bottle (longnecks)....its better to go the premium kits for $11. (and they come with better yeast then the coles cheapie)
If you havent already then one day get into using all malt, eg a tin of goo, coopers, etc, whatever, then instead of 1kg sugar/dextrose add 1kg of Light Dry Malt......you'll never look back. Then you'll get into adding hops, then different yeasts (try US-05) and its ALL OVER FOR YOU
....hook line and sinker to better beer, much better beer than most the stuff u can buy
At around 8 dollars I am tempted to try one myself, although I will skip the suggested sugar.
Any thoughts?