We used our Disney Reward Visa for my whole Master's Degree! Since we stay offsite at a timeshare now, we use the Rewards for dining. We haven't paid cash for an onsite meal in the last two trips! In fact, last trip fell within the statement closing date, when they release more points. I called from my cellphone (in MK) and had that month's points transferred to the Rewards card in my possession. The transfer was immediate and it paid for part of dinner that night!
DH and I now joke about major purchases. When we bought a new washer and dryer it became not a major purchase, but one "free" dinner at Chef Mickey's!