The products are great for people who tend to overspend with credit cards (provided they do not overdraw their checking when using a debit card) and are convenient. But, there are some things you should be aware of.
- Know your liability policy, the "Zero Liability" that you see marketing generally applies only to cards branded with the Mastercard or Visa logo.
- The Zero Liability doesn't apply if someone else uses your PIN.
- Potential fraud or stolen cards need to be reported FAST. Debit cards are governed by different laws than credit cards.
- It is generally harder to dispute purchases on debit cards than credit.
Link
Read more about debit cards.