Of all the applications GoToMeeting is the easiest and fastest to get setup and going. Others may have more bells and whistles, however most only use 5% of their wordprocessor functions, or 5% of their spreadsheet functions, so a solid performing, reliable and cost effective solution for online meetings like GoTo Meeting is just what you may need.
You can host as many meetings, as often as you like, for one flat monthly price. Take a look at their free trial of GoToMeeting: Free Trial + $10 Off.