The price. You cannot beat the cost of use. It does everything I need to track phone calls at a fraction of the price of other platforms. I also find it to be more accurate when tracking duration. Customer support has been great as well. Campaign set up is easy and intuitive.
I would like it to show more campaign details to my affiliates if needed such as call hours and geo targeting. Perhaps there is a way to do this but I have yet to see it.
Its easy to use and does everything I need it to do. It allows me to accurately track and record phone calls.