I like everything about how easy it is, once you get used too its very simple! You can see where your traffic comes from as well which helps when trying new affiliate products or services. It doesnt really work all of these but if there was one missing i would say this because otherwise nothing at our end will show up in google analytics unless someone manually adds each trackers source code into their GA account settings page. We are able to easily integrate other systems such as Mailchimp so having multiple tracking software's isn't an issue anymore either.