Pretty good, quite fast.

At pickup, there was constant upselling of various insurances and GPS... They didn't inform me what kind of gasoline to use, so I had to double-check myself.

The store is within walking distance from Southern Cross Station. We were four people, and two of us took an Uber with four suitcases, costing 8 AUD, while the other two took the tram. The car rental company is very professional, and the staff explained everything patiently. We left a 100 AUD deposit, which will be refunded 7 working days after returning the car. However, we haven't received it yet. Returning the car at Avalon Airport is also convenient. Just park the car at the designated rental parking lot and drop the keys in the Dropbox at the car rental counter in the terminal. Local time at the airport and major streets and scenic spots can be seen locally.

I think that Europcar can improve its return process because who receive the car were not informative and friendly. So I had to come back to the office service to ask some questions and evething was easily managed.

Like: The price was cheap. We booked first a Toyota Corolla and were given Volkswagen Golf, which is totally fine with us since the car is very good. We didn't ask for it but the GPS was included with the car for free. We had to pay a little extra for an additional driver, as expected.
Dislike: Really... I have nothing to complain about...