We have used BrightTalk and WebEx.
BrightTalk was frustrating because in order to attend a BrightTalk webcast you have to first register with them and the form they require you to fill out is way to long. But once a person has done that it works just fine.
I agree with Naor that WebEx works just fine but here are some of my gripes about it.
-
It can take up to 24 hours sometimes for the data to be available for who did and didn't attend your broadcast.
-
Also we have people who forward their Registration Confirmation/Reminder emails that contatin their links, and when this happen the person ends up fillout the WebEx form and gets in without putting in all their information.
-
It will also accept any email address that you put in provided you have the password so we frequently get people who register under one email address and then sign in with another and then get mad when they receive both the Thanks for Attending and Sorry We Missed You Emails, so we have to manually look for those now.
I have used GTW with previous automation platforms and while there is inability to upload a Document and easily pass back and forth presenter rights, it did allow me to get the data I needed in a times manner.