You can purchase Go To Meeting through a monthly subscription fee of $49 or a annual subscription of $468, a savings of $120 over the course of a year. There is a 30 day free trial offer to try out the service. This allows you to hold meetings for up to 15 participants, and the meeting participants to not have to be members. As noted above, the process for participants to log in is quick and easy. There are larger subscription packages for larger meeting numbers. The voice conferencing option comes with the subscription.
If support is needed, it is provided online and through a 1-800 number. Those that I know who have used the program shared that email queries are normally responded to within 24 hours.