It is also the cheapest and fastest way to arrive to the city from the airport and vice versa!
Single tickets are 1.10 euros and tickets including 10 trips are 5.20 euros... do the math! ;-) (btw these tickets are valid for the buses too)
* even if it is safe, as everywhere and with everything use precautions and common sense (for example don't take the subway alone at 3am and close your purse if the wagon is packed...)

