You have five minutes to introduce yourself to the next randomly selected person and then you stop. The whole event is 90 minutes so you can meet eighteen people in your scheduled event. If you get a "hit" connection, all the better. My client met up with a recruiter in his field on the second five minutes he was there. They scheduled a formal phone interview right after that first quick meeting.
I signed up for December 16 in Boston. I'll keep you posted, but meanwhile, check out the website and decide for yourself.