http://www.sounddampedsteel.com/forumdiscount.html

SDS are offering Art of Sound members a 10% discount off IsoFeet & IsoPlatMat. To access this page you must use the link above as there is no navigation to it from the website. The page will be available till 14th January 2015

Below is a link to a recent HiFi World review
http://www.sounddampedsteel.com/hifiworld2013.html