Last time I was there (August 2003) their charges depended on the hours. Can't remember exactly but I believe it was S$ 2,- for 30 minutes and S$ 3,- for an hour during off-times. Peak-times: S$ 3,- for 30 minutes and S$ 5,- for an hour.
Sure, these rates are not the lowest in Singapore. But I'd tried many other Cyber-cafes that were cheaper and they simply were not up to scratch, i.e. very low throughput, dinghy keyboards, kids playing LOUD Quake games, dim-witted staff, Win95 blue screens, that sort of annoyances. I guess you get what you pay for.
Chills tends to draw in its own target-group clients; the ones that don't mind paying slightly more than average for a much, much better than average service. (No, I don't own stock

)
Anyway, best to drop them a mail to get the latest rates.
NBB