It's easy to run up large debts
Whilst it's easy to run up a large debt on your plastic, it can be much harder to repay it, and this can take a considerable amount of time.
Interest charges
If you incur interest charges it can take longer to clear your balance, and this can cost you more.
No interest-free period for cash advances
Interest rates for withdrawing cash are usually significantly higher than for balance transfers or purchases and there is no interest-free period, meaning interest is charged from the date of the withdrawal, regardless of whether you clear your balance in full or not.
Choosing the right credit card