I almost never use Priceline 1) their cutoff is 11PM EST. 2) no rebate on bookings as with Orbitz 2% stackable for future hotel bookings 3) Priceline CSR's are unforgiving, unlike Orbitz where you often can get a $25 coupon as a payment for your troubles when there are issues. Also, after you make a booking on Orbitz you can go in and see the deadline for free cancellation and take a screenshot in case you're paranoid about the cutoff time.