First travel to downtown Denver, then head to Rocky Mountain National Park. The latter deserves more

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.

Overall okay

The booked Jeep wasn't available, so they upgraded me to a high-end GMC. Very impressive.

The Dollar branch at Denver Airport is a scam combined with robbery. Without my knowledge, they added three additional insurance services: RoadSafe, Supplemental Liability Insurance, and Personal Protection Plan, plus various taxes and fees totaling $1009.63 for 29 days! It was nearly $2000 more than my rental cost. I ended up spending over $10,000! The middle-aged man at the Dollar counter just checked my reservation, asked me to confirm on an electronic signature pad without explaining anything, and I signed. Then, he printed a long, narrow receipt. I took the contract and left without suspecting anything. Returning the car was also smooth, took just a few minutes. Today, I checked my credit card statement and saw a $1009 charge from Dollar. I hurried to look at the contract and found they had added all these insurances. Check Google's reviews for this branch; it only has 1.7 rating. I deeply regret using Dollar and will never use them again. Also, the basic third-party liability insurance provided by the rental company is practically useless in the US, similar to basic liability insurance in China. You really need additional third-party insurance of $1,000,000 to cover any potential costs in case of an accident.

Like: best rental adventure ever...the ability to pick any vehicle in your category is a great bonus...vehicle was almost new, got great fuel economy, and was fun to drive
Dislike: don't know anything that could have made this a better rental