I installed nBill without a hitch. There were no problems that I experience other than having my own problems setting up the Authorize.net payment gateway to work with Authorize.net. Although it was my own oversight, the nBill support team did not hesitate to help me over the hurdle.

I'll also mention the great functionality of nBill. I had a lot if requirements for my billing solution and nBill worked 100%, right 'out of the box'. Furthermore, the additional functionality helped me to extend my site without having to customize any of the code in nBill. Their events directories were the perfect solution.

Thanks nBill!