I would like to get everyone's opinion on billing software in terms of price, function, integration, support, etc...

can those who voted for "others" please elaborate?

thanks...

My vote is 100% OptiGold ISP, I have been using it for over a year now, and it is very powerful. It is great, updates once a week, (all free), and you even get to give input into what is going to happen.

Just my .02