Melbourne doesn't have a metro, just an extensive commuter train network with railway lines radiating out from a city centre terminal to and through the suburbs to a rural-ish fringe. 20-45 miles away from the city centre in Ye Olde measurements, longest take an hour.
Frequency is good in the morning and evening peaks, 15-10 or less minutes, afternoons and nights can be 20-40 minutes, on Sundays its practically dead and finishes too early.
In addition to that scheduling problem it overall isn't working too good because they've been neglecting maintenance and upgrades and new lines for about 40 years, now with a surge in patronage it barely copes. However in that same time frame they managed to build 10 freeways, and now want to build even more some of absolute monstrous proportions
Then there are trams in the inner area, they're good but could do with some lines crossing them. You can get to/from the city centre to a lot of places, but suppose you're wanting to get across?
Buses routes can range from good to very shonky. Also depends on how many service a train stations since they're mainly geared towards a feeder.
I can get a bus that circulates through the local neighbourhoods and be at the train station in 5 minutes or walk via a bike trail in 20 minutes, its got a reasonable frequency in the morning and evenings but only once an hour during the day and finishes at 7:30pm, finishes at noon on a Saturday, doesn't run at all on a Sunday.
So overall, it is okay but not good and has problems that are not inherent to infrastructure but due to policy decisions and (mis)management.