I've listened to their Sing to God album and I like it! They're certainly talented and one of the more unique bands I know of today. When I first heard them, I was extremely impressed.
I have to say, though, that sitting down and listening to them - it quickly becomes a bit much for me. The energy and the chaos, while good, takes it's toll on me and the whole Sing to God album (double by the way) is a bit much for me in one sitting. Actually, it's a lot too much.
A bit of Cardiacs now and then is awesome though