I've just returned from Bratislava, the capital of Slovakia. To get
from the airport to the city centre you need bus 61 for which you must
pay in advance at a the machine at the bus stop in Slovak coins (no
notes accepted - how many arriving travellers will have 18 Sk in coins
accessible?). Then the bus takes you through a partly developed
shopping park, past endless grey crumbling appartment blocks and a
couple of sex shops before ending up at the main railway station.

Despite all that the public transport there is very good once you
understand it - every bus or tram stop is identified at the stop and
then announced during the journey. But beware of the ticket inspectors
who travel incognito for a while then pounce and deliberately pick on
foreigners!