Quoted from a trip report:
http://www.flyertalk.com/forum/Forum81/HTML/003080.html
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by LH738:
I took the KliaExpress to Sentral and from there a taxi to the hotel. Thanks to a discussion I knew about this train. The KliaExpress is clean, fast (28min one way), and comfortable. There are even restrooms inside. The KliaExpress drives every 15min. </font>
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by LH738:
I took the taxi (7.5RM) to Sentral and from there the KliaExpress (35RM, oneway) to the airport. Passengers for MH-flights can check-in at Sentral. It's planned that passengers for all flights may be able to check-in at Sentral in future. The airport code is XKL. Passengers that want to receive their luggage at Sentral have to use XKL as final destination.</font>
I don't know if luggage check through for any airline to XKL is already available.