We used priceline.com to book one of their "make a bid" hotels. We entered the dates and found out where we'd be staying. However, due to an emergency, we had to change our dates of travel, but priceline.com was not very helpful with this situation. We were allowed a one time only partial refund on our original booking, but this will never be allowed again, we were told. We were also charged a penalty fee which could be applied to a future booking. However, we will be using Hotels.com or a different booking site from now on. No more priceline.com for our family!