San Francisco-Los Angeles-San Diego-Las Vegas-Los Angeles

Overall, I'm quite satisfied. The car was in great condition, it was a new model X3 with strong power and quick acceleration (probably because the car is relatively light). The onboard GPS was very useful. Important to note: The counter staff will still offer additional paid items such as insurance and prepaid fuel. I had already purchased insurance when I rented the car, the likelihood of needing glass and tire insurance is low unless you are in an area with poor security (like an incident near my home where a car window was smashed and robbed). Generally, you don't need it, especially if you're staying in a hotel. Prepaid fuel is also unnecessary; many gas stations are cheap, and it's unlikely you will use up a full tank right when returning the car.

Acceptable

Had to wait in line for a long time, and they kept trying to upsell.

Not bad. We arrived at San Francisco airport in the morning, not many people, waited about 7-8 minutes.

Like: Service staff was friendly and helpful
Dislike: Waiting time at SF airport car pick up was too long