Edit: forgot to mention dirty and often unsafe.
Edit: forgot to mention dirty and often unsafe.
Another story are the renovations and building projects that just cut whatever part of the public transportation down for days/weeks. There are alternative routes one can always take, but I prefer to stay out of the hot U-bahn during the summer days. There can be some nice surprises, like that one Monday morning when this guy decides to start smoking heroin in a full and sweaty U8.
Edit: Forgot to add that the trams are awesome. Air-conditioned, fast and comfortable in the eastern part of the city.
Never felt unsafe, but the heroin usage and dealing is very open and in your face during the commuting hours.
Unreliable: true for the S-Bahn, outages are frequent.
All things considered, it's still better than all other big cities I have visited.
Just an anecdote: I once witnessed a really large muscular and completely drunk guy attacking an actor that was dressed up as Friedrich II., including what looked like a rapier or small sabre. The situation was definitely unsafe for the actor and (if he would not have managed to protect his rapier, because that was what that drunk guy was after) potentially dangerous for anyone else.
Another day I had to interrupt some aggressive youngsters trying to rob other passengers in the middle of the day. When they left it turned out they were armed with knives. Not a fun thing to learn. I notified the subway driver once I got out (the gang was moving from wagon to wagon), but he essentially did nothing to stop them.
I have not witnessed such stuff in other cities' public transport. And certainly not in that frequency.