Yes. Bus, because that's the only type of public transport (well, there are trains but it's the same infrastructure as when the English installed them and are horrible)
Not happy. It's not universally accesible, it's expensive, dirty, most of the lines are slow, and talking about lines, maybe the capital doesn't need about 300 lines, most of them do almost the same journey but with some little change, or just because they belong to different companies. That is all responsibility of the companies that run them.
About the capitol's gestion of it, I'm bittersweet about it. Yeah, secondary students get free bus, and yeah university students like me get discounts on the tickets. But again, common bus tickets are too expensive (it's a bit cheaper if you use digital passes, but still). And I'm tired of the urban planning exclusive to buses. I think a city our size deserves a metro, or at least some tram lines.