Fly Wills
Google
Definitely worth it for the price paid. Situated inside the stadium, it boasts several levels of memorabilia spread over different sections dedicated to different sports. These including Australian rules football, tennis, cricket etc.
Most highlighted is the special cricket section, where you can enter a 3D projected Shane Warne experience, where the late, famous cricketer comes out and gives a talk about his career with the Australian cricket team.
There are also lots of interactive areas where you can try out catching, pedalling and other sports. This especially great for children. You are also given a wristband that allows you to interact with many of the displays in the museum.
Overall a very enjoyable visit. I would allow for about 1 hour for a visit. This will allow you to easily see everything in the museum and fully enjoy it.