The best part is that we have been able understand our customer behaviour through this model which has helped us improve many aspects! I dislike nothing about it as such but one thing would be adding some features like how often does an advertisement/market research impact sales or vice versa!! This tool helps me analyze my data from various perspectives so i am very happy with its useability for all levels including beginners also.
One must go thru training first before using any kindof analytical tools otherwise you might end up going wrong way. !