We chose the "small" group tour as we don't like too many people going around with us. It turns out, we were the only two in the tour! We got to the Great Wall so early that we were waking up the people there to take our tickets. The guide, Robert, was excellent as well!
We were surprised how incredibly beautiful the Twelve Apostles were! Melbourne has so much more to offer than Sydney. This particular tour is a must for anyone visiting Melbourne. The only drawback is that the tour took so long. It's just that the Twelve Apostles is so far from Melbourne.