It's okay, nothing particularly good or bad.

Good service.

I booked an automatic Touran but when I got to the airport, they said they didn't have any! They gave me an automatic Golf instead, but the price remained the same.

The process was quite convenient. They asked for the order, driver's license, passport, and notarized documents, then only inquired about additional insurance (I guessed, as my English isn't great). I declined, swiped my credit card, got the keys (which had the parking spot number), and left. Originally booked a BMW 3, but got a new Lada with only 1700 kilometers. Returning the car was also very easy; I just said 'done' to the staff (non-native speaker), they checked the car with a device, and it was fine. Back at the office, they gave me a receipt.

When we arrived at the airport to pick up the car, they required us to present two international credit cards for the driver as a guarantee. Avis explained that it was because we rented a high-end car, an Audi A4. I felt it was unnecessary. After some negotiation, they gave us a smaller Infiniti mini wagon. Although Avis said it was a downgrade, the car we got was brand new. Amazing!