Very good.

The Europcar counter is right in the domestic arrivals hall. We picked up the car around 9 am. There was no one in line, so we were helped immediately. All the counter staff were of Indian descent and had a bit of an accent, but they were very nice. They checked our passport, driver's license, and its translation, asked if we had bought insurance, and then gave us the car keys. We walked to the parking lot ourselves to pick up the car. The parking lot is left when you exit the arrivals hall. Compared to other car rentals at the airport, Europcar has relatively fewer parking spots.

Quick processing

When traveling through NZ, was NEVER told that needed to change cars at the ferry, between the north and south island. Had to change all my ferry bookings at the last minute. Absolute nightmare of an experience and neither Europcar nor Easyrentcars.com wanted to take the blame for the lack of notice. VERY unimpressed with both. Would have rented from other companies if rentals hadn't been sold out.