This year alone I have used my Annual Metcard on a Bus (not SkyBus) to/from MEL no less than 6 times - So no additional cost to me other than time.

The Skybus is quite an efficient service taking between 15 and 30 minutes depending upon the traffic and costing $12 a trip (with a 10 trip ticket).

I DO NOT pay for taxis to/from the Airport. it cost $10 simply to go past the F1 Hotel.