Best car rental agency in Thornton, Colorado (CO) 2024

I am extremely disappointed in Enterprise. I am without a car and needed a rental as I travel a lot for my jobs and Enterprise typically offers decent deals and great service. Not today... I modified my reservation by moving the rental up a day at a nearby location and was immediately notified that no cars were available today. Totally fine, I realize there's a shortage and appreciated them letting me know. Then I call this location and they tell me they have a car available today at a specific time. Unfortunately I got caught up at work and I show up 20 minutes after to learn they gave the car to someone else... and no alternative. ok?.... If you have a "20 minute hold policy" it would be great for that to be communicated before I travel 30 minutes across town on my lunch. Extremely disappointed in this lack of communication and consideration but thankful that Avis/Budget was able to provide the service Enterprise can't. ~Patrick