'Substance' is probably Echomen's best production ever. Only some of their earlier works on End Recordings have really reached the same depth and quality as this one has. It isn't just prog house – it has some nice and warm elements which make it deeper and it's more like a good, deep, house tune. But that's just the main mix. Mooncat remix is somewhat irrelevant. It's a stripped-down version which has very little to do with the main mix – a true filler.