It was purely the simplicity of the user interface for visualising the steps in the sales funnel and seeing exactly where you were losing conversions. I think y

It was purely the simplicity of the user interface for visualising the steps in the sales funnel and seeing exactly where you were losing conversions. I think you can construct something similar in Google Analytics but KISSmetrics is a much more focused tool (but not worth the difference between free and $149/month!)