I've been using FastSpring on my site for about 4 months. Customer support is indeed great. I sell software and I like that they have file fulfillment service

I've been using FastSpring on my site for about 4 months. Customer support is indeed great. I sell software and I like that they have file fulfillment services. After a certain number of downloads/days the link stops working cutting back on piracy. I could code this all myself, but it would take time and it would be a headache to deal with email. Also, I really like how there is no monthly fee. This makes FastSpring ideal for testing new products albeit a little more expensive than alternatives in the long run.