I recently had a requirement to develop a subscription-based site (also a first) and picked one of the first ones I saw in the list with decent reviews and that didn't cost too much. I won't say which one. I had a small question and posted a message to their forums last week and I still haven't gotten a response.
Yesterday, I realized that it wasn't going to be flexible enough for my needs so I started looking for another one and found Akeeba Subscriptions. Once again, I had a small question and sent an email to the Developer. I ran to the store down the street for a few things and by the time I got back, there was the answer I needed in my inbox, on a Sunday!
The component is very flexible, easy to implement and offers a great deal of customization and different options for payment gateways, and it's free! I couldn't be happier. My only regret is not researching more and wasting the money on the other component.
Thanks again and keep up the great work!