Service was alright, but we were charged an extra $88 for insurance. Dollar's service was mediocre. The car provided by the rental company had a windshield that was coming off and leaking air. We only discovered the source of the noise after driving 200 miles. We detoured to Salt Lake City's Dollar Airport location to exchange the car, but the staff insisted we call customer service to get a confirmation number. In the end, we gave up and drove the car back to Denver. Exchanging the car was too exhausting and we didn't bother to file a complaint.