I'm not willing to take the chance to save $30 in the middle of the night in a strange city- any strange city. If you are somewhere unfamilair, you should not attempt to save $30 when it could mean the difference between safety and an unpleasant encounter. Unless you know the situation, you know the neighboorhoods, and are familiar enough with the public transportation system to know how not to get lost, there's no way I'd trust that after rush hour. To me, it's just not worth $30.