This has generated some criticism as its implementation often results in passengers paying more than the necessary fare. This can be due to not having the correct change or, more commonly, tourists and visitors being unaware of the policy until after they have deposited money.
The introduction of this system has been met with some criticism, as it frequently results in passengers overpaying for their tickets. This is often caused by a lack of suitable change or, more commonly, travelers and visitors not being aware of the policy until after they have paid.