Others like to see eta times in minutes, I like to see where the bus is at the moment on the map and step outside a few stations before reaching mine. The times in minutes are dependant on the movement of the bus so if you see the eta of 5 minutes and the the bus gets stuck in traffic after that, those 5 minutes will last a lot longer. The app itself is very well thought out, UI and such.
Transit Tracker+ - Chicago at Google Play market analyse