How does it compare to the CX specials...
of HKD 100 for AE r/t and 30% off one-day pass?
The CX special offers AE r/t for HKD100 to/from Central
30% off the HKD50 one-day passes (so HKD 35 but only purchasable at AE stations)
I'd say that the CX special will cost you less (HKD100 + max. of HKD 140 for 4 days)?