We checked a variety of check-in dates for the Killeen Texas Comfort Suites, including Christmas Eve, Christmas Day, New Year's Eve, random weekends, and week days, and the rate remained the same: the rate is $99.99 per night (this can be for a single king, or 2 queen size beds).
Advanced purchase for some dates starts at $79. Advanced purchase offers a discount because you pre-pay for the room, but there are no refunds for cancellations or changes and membership in their Choice Privileges program is required.