I have been once a few years ago. Some of it is certainly enjoyable, like meeting people you know from the Internet or wouldn't have meet otherwise. And overall the organizers are doing a good job. But it feels like a lot people go year after year no matter what, in a bad way. Thousands of similar people talking about the same things year after year. Add to that the cost and logistics of it all, and don't feel much of a need of going again.

So I might be worth it for people who haven't experienced that sort of thing. But otherwise I would recommend watching online with some friends and travelling someplace else for new experiences.