I bought mine direct from the Lego store for £35 + delivery. So, check there first, this price (currently £72) is a rip off. The JINX site shows it as out of stock, the Lego store does not.
As for reviewing the product.. it's a small Lego set, size wise, but I think it packs a lot in. I think it does a good job of replicating the Minecraft world.
Like all Lego it comes with instructions for putting it together but you're free to change it to suit you. It uses standard parts with perhaps a few non standard colours (though these days it's probably all standard apart from the creeper). So it follows all the Lego rules, but I do think that you would need to be a Minecraft fan to get much out of this, otherwise another Lego set would probably provide more for your money.
I think even £35 is still quite pricey and it that's too much but you (or your child) already have some Lego you can probably make a decent Minecraft build without this. If like me you're an overgrown child who can't justify filling the house with Lego, this is a great little set.