I used my debit card exclusively two weeks ago-helped me keep better track of my spending-as another poster said, make sure you know what your daily "cap" is with your bank. I placed money in my account to cover a Dell computer. Computer price was more then my daily limit-they had to call my banks cs #, o.k. the transaction, it was a pain, all the while I am on hold! The debit card really helps you cut down on silly impulse purchases. Didn;t use it at any food carts but did use it at several counter service rest.