Real-time statistics for your affiliates on everything. The tracker IDs are also passed when a sale is made. This means affiliates can track which ad gets the most sales. Affiliates can view stats by the day. Shows the referring URLs and how many hits each got.
Affiliates can add tracker notes so they can be reminded which ad was for what.
Affiliate area runs off a header and footer file which you can edit in the admin. So your affiliate program will not look like everybody else's. Affiliates can add a short code to the end of their referral URL and send traffic to different product pages. If the admin desires, the affiliates can view their second tier and even send a mass personalized mail to them. The whole script is completely customizable, all from the browser.