1. We weren't informed that we needed a pass for crossing the border, only told to show relevant documents to the police if needed, resulting in a 150 Euro fine. 2. The amount charged didn't match what was told at the location, they overcharged us by more than 3500.

Staff were indifferent, sometimes appeared impatient

They didn't accompany us to inspect the car; they just briefly explained the route to pick up the car.

The car pickup process was very unpleasant. The rental company staff was unwelcoming, and didn't show any effort to understand the address in Chinese Pinyin. He impatiently directed me to the garage, which was located in a public parking lot next to the Ritz-Carlton.

Europcar is pretty good. Picked up the car in Vienna, the process was simple. An automatic diesel Golf. The car was very new, only 15,000 kilometers, and very easy to drive. Returned the car in Prague, and the store even helped call a taxi. No upselling, charges were according to the contract. Recommended.