We've just travelled around Malaysia, Indonesia ,Borneo & Singapore and withdrew money from atm at airports.
You get the same rate of exchange as outside the airport.
I did however get cloned and lost around £200 but the cloning happened after using an ATM in Bali in the town, not the airport.
As a bit of reference for anyone planning travels, I used my TEB card. Withdrawal fees much less than with UK card.
The procedure after you get cloned has been complex though, had to go to the Adliye last week to make a statement and have it stamped by the Prosecutors office, that was interesting....hopefully I will get the money back as my passport shows I was in Singapore when the money was withdrawn in Bali.
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