excellent

There were two staff members handling the process after queueing for a number ticket. Compared to bigger car rental companies, it's a bit lacking, but overall it's okay.

Pretty good

The rental company employee was punctual and waited for us at the airport.

When booking through Zuzuche, I carefully checked the terms, which said a pre-authorization of 2500 euros would be held. However, at the store, they said it would be 3000 euros unless I purchased their insurance. Although I explained that I had already bought insurance through Zuzuche, they insisted on the 3000 euros deposit. Additionally, the price for the child booster seat was higher than quoted on Zuzuche. There was no one to pick us up from the airport and we waited a long time until I called them. The only positive aspect was that the car was relatively new.

Although the location is a bit far from the airport, the service is great. There's a pickup service from the airport when you rent the car and a drop-off service when you return it. The staff is very friendly, and you can ask them about Iceland road signs if you haven't done much research.