The Munich airport branch isn't open 24 hours, they start at 8 AM, and their customer service was quite poor and indifferent.

Unable to pick up the car in advance

There were very few people, almost no queues. There are four counters where you can pick up the car. A young lady was very nice. However, a middle-aged woman was unfriendly to newcomers. One major dissatisfaction was that I booked a Volvo and asked if I could get one if I wait until the reserved time. They said it's impossible to get a Volvo.

The service was professional and straightforward, with a warm attitude. We booked a compact car but were upgraded to a Range Rover for free, which included a built-in navigation system that was very helpful for our trip. However, since we had never driven this type of car before, it would have been beneficial if someone could have given us a basic introduction to the unfamiliar vehicle, to help us drive it smoothly.

I had an experience of changing cars in Rome, Italy. Their efficiency was very low, and they didn't replace the car with one of the same class, but with whatever car was available.