Dear JPM,
No I have not been to the Brisbane one. I have however been to other interstate property expos and find that you will get value.
How much value is open to debate but you will certainly get more than $11 worth of value. Generally I have found that the 30 minute sessions by the speakers are 10 minutes self-advertising; 15 minutes more helpful information; and 5 minutes question time. This varies with speaker and how prepared they are.
Believe that you should be able to get along to most of the sessions you want to. Leave out the superannuation, shares and Richard Clarke ones and have a look see at the rest of the property ones. If you get one good idea then it's worthwhile.
Bazza,
Hope above answers your questions. Definitely attend the Jan Somers and Geoff Doidge ones. With the other property one's try them. You can always leave if you feel the speaker is not worthwhile.
Cheers,
Sunstone.