Poor, good chunks of the city have no bus access, I ended up staying in an area that was pretty dense (3 stories minimum) and Google Maps said there was no possible route via mass transit. Turns out the bus is over an hours walk away.
there is one light rail line, and it runs like once every 30 mins. I can't speak for the bus system, since it doesn't make sense for me living in North Austin. It took me 15 mins to drive to the train station, 40 mins train ride into Austin, and then 15 min walk to my office downtown. The drive into town is half that if you come in early, so I opt to drive.
MARTA in Atlanta is pretty good from what I've seen. Rail has been on-time (+- 3 mins) every day since I started using it 6 months back. Service is decent, facilities are pretty clean imo, and the MARTA PD is always present.
