Great question — answering as the UphillTech team:
Well, you cannot get all three out of 'easy, cheap, quick' so you'll have to pick and choose. The Wikitravel entry on Kuala Lumpur has a comprehensive list of options available to get from the airport to the city (same article that you linked to, different section). Kuala Lumpur has a vast urban train network but the confusing part is that they are all different 'lines', separate systems you need to buy separate tickets for. Most of them pass through one main station called KL Sentral, so if you can get there from the airport, you will be able to connect to any other place within the city. Essentially, you have three options: KLIA Ekspres : This is the fastest way and takes about 30 minutes...
Full answer by Ankur Banerjee: https://travel.stackexchange.com/a/513 (CC BY-SA 3.0).
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