Thanks for the tips. I will be going in winter..... Xmas time. Probably 7 days, hopefully this is not too long of a stay for the 2 year old?? I was thinking to also add in HKG-KUL-HKG which is a 4 hour flight one way. Do you think this is too much for the little one? i.e. SYD-HKG layover for 7 days, then HKG-KUL layover for a week and then KUL-HKG maybe layover for 2 or 3 days then HKG-SYD. The HKG-KUL-HKG will be on coach while SYD-HKG-SYD will be in business on VS....
I'd take the stroller for a few reasons:-
If you go shopping the centres are HUGE.....therefore, you can spend quite a bit of time there....including eating at the many great restaurants that inhabit shopping malls
Many places are linked with overhead bridges....easy to walk between places.
Easy spot for the little one to catch a nap and for you to easily carry on doing other things
Depending on the time of the year you intend going, definitely stay somewhere with a good pool.