I have an eshop and I'm going to launch an affiliate program for it. I've considered numerous referral software products and stopped on these: ShareASale, iDev Affiliate, Jrox and PostAffiliatePro.
(One of the main reasons is the possibility to buy a license and not pay for the software each month)

I would like you guys to tell me about your experience with such softwares, maybe you've worked with some I've counted.

Thanks in advance.