The ease of use, its price for such an advanced platform as well it's functionality! I'm very happy with this product so far but if there is anything that could be improved upon then please let me know :) It has been easy enough to implement in our website without too much hassle or problems from my end (I am not technical).
We are now able to track visitors/pageviews etc using parklogics API which helps us understand where people come into contact through online means before engaging them further via email.