I was fortunate that my group for this tour consisted of me! My guide showed me around the inner workings of the club including the members area and the enormous changing rooms. He explained how the ground is switched between cricket in the summer and Aussie Rules in the winter, and didn't rush me round.
After the tour you get to wander at leisure around the museum. This is where, if you're into sport, you will need to leave plenty of time. The museum basically covers everything you want to know about cricket, rugby, AR and football with a lot of memorabilia to look at.
SInce the tour I've attended the Boxing Day test against New Zealand, and a Big Bash between Stars and Thunder. This is a great place to watch cricket and soak up the atmsophere that exists even when the ground is empty.