Very good, but got fined for speeding.

I booked a Corolla but was given a Civic. They asked if I wanted to upgrade without being pushy. Knowing I was driving the Great Ocean Road, they even provided me with a map and pointed out several famous spots. They also reminded me to set Google Maps to avoid toll roads since I didn't rent a toll pass. I bought fuel, and returning the car without a full tank was slightly more expensive but acceptable.

Pickup and drop-off were both quick and convenient.

The service attitude wasn't great, the staff sounded very indifferent.

After informing the staff that I had purchased additional insurance, they didn't try to sell me the store's insurance. They did charge an extra 100 AUD as a security deposit when swiping the card, but it has been refunded.

Although I had some reservations about HERTZ pushing me to upgrade the car, to be fair, their service was still pretty good. The wait time in line wasn't long, and while communicating in English wasn't as convenient as in Chinese, I couldn't expect too much while abroad. At pickup, the staff informed me that my reserved Corolla wasn't available and suggested I upgrade to an Audi Q5 by paying extra. I thought it was an additional 18 AUD per day, so I accepted. Later, I found out it was actually 45 AUD per day, totaling 180 AUD for the 4 days. While I was okay with the cost, suggesting a luxury car upgrade immediately did feel a bit pushy. The Q5 was in excellent condition and very new, but there was no manual with the car, making opening the fuel cap a bit challenging. The car was great to drive, and I had no issues, making the rental experience smooth overall. I was in a hurry to leave and didn't have time to argue, so I took the risk and accepted the luxury upgrade. The 3 AUD per day charge for roadside assistance added up to a small amount, and since I realized this after the fact, I won't dwell on it.