landed at my door was about $680 aus i think. best money i've ever spent on my car. there is alot more info at this website.
http://www.astraownersnetwork.com/forumdisplay.php?f=83
the person that makes these and does all the tuning for the astras is called ABYSS if you have any questions he will be more then happy to answer any questions you might have. it's all astra stuff but everyone who has got one of these tuning boxes swear by them. and the results are great.
http://cgi.ebay.co.uk/Vauxhall-Astra...QQcmdZViewItem
also Paulie will be able to back me up about the difference the box made to my car. and they are fully adjustable.