I hesitate to call it a kit. Can you all get these in the US? It is an all-grain high-gravity wort that comes in a 15L bag, and you add about 8L more water to it to make the starting amount. I say about because you can make a stronger beer with less water.
Anyway, I was running low on the kegged stuff and was going on a 5 day trip so I started a batch of their pale ale and pitched Danstar Windsor yeast into it and when I came back it was time to keg it. Total investment in time so far including clean-up about 15 minutes. It tastes like a respectable micro brew, and in my opinion you absolutely cannot do any better considering the time it takes to make a batch! I've hacked these in a number of ways with specialty grains and liquid yeasts and hop additions in the past, but for a quickie batch that keeps me away from $10 six packs I love 'em. My only caveat is throw away the Cooper's yeast that comes with them and go for a better brand.
Maybe you can bug your LHBS to carry a few for those times when you want to be drinking your own brew in less than two weeks!