1. Delayed car pickup with a bad attitude. 2. Numerous after-sales issues after returning the car, especially when booking through a third-party platform. They shirk responsibility and make unfounded charges, repeatedly charging misconduct service fees without any proof. 3. Many hidden issues: firstly, due to the domestic rental platform acting as a middleman, and secondly, neither the rental platform nor Avis could provide sufficient evidence for the so-called violations and violation management fees. Users are inexplicably charged on their credit cards! There is no way to complain or appeal!

Logged into the 'Zuzuche' website in China to pre-book a Mercedes-Benz C-Class four-door five-seat car and already paid (rental prices vary by car). On July 18, 2018, when picking up the car at the car rental counter in Frankfurt Airport, the German staff told us that no Mercedes-Benz was available and offered a BMW 3 Series four-door five-seat as an alternative, showing it on a computer screen. After confirming multiple times, we agreed to accept the alternative. Additionally, the staff tried to upsell a Volvo SUV, which we declined. When we went to the parking lot in Frankfurt Airport (about a ten-minute walk) to pick up the car self-service, we found it was actually a Skoda four-door five-seat. We returned to the counter to inquire, and the staff again said no Mercedes-Benz was available and only the Skoda was offered. We sternly pointed out, 'We rented a Mercedes-Benz as shown available on the website and paid for it. Therefore, the company should provide a Mercedes-Benz or give a reasonable explanation for why not, obtain our consent to provide an equivalent or higher-class car, and assume corresponding breach responsibilities. Additionally, claiming falsely that a BMW 3 Series would be provided is an attempt to deceive us. We demand a reasonable explanation and solution.' The staff then took out a key to a Mercedes-Benz from a drawer within two minutes without explanation. We successfully retrieved the car ourselves (a 2017 Mercedes-Benz C-Class 180 four-door five-seat car). Upon inspection, this was the only Mercedes-Benz in the dedicated parking area for the rental company at Frankfurt Airport, and it was a new 2017 model.

Price increase for upgrades, pressured into full insurance, paid 150 euros more than online booking

Free upgrade: I was worried that our luggage for a group of four over 11 days wouldn't fit. After checking many cars back home, we finally booked a Passat station wagon. But I was still a bit concerned. At pickup, the rental contract stated OPEL. I thought I got an Insignia station wagon and figured it definitely wouldn't fit. I asked in my broken English if this car was bigger than the Passat. The staff assured me that it wasn't smaller. Skeptical, I went to the garage. To my surprise, as there were no other station wagons, they upgraded me to a brand-new Opel Zafira, registered on September 22, with only 8 kilometers on it. We filled the trunk completely. Note that during the rental process, a full tank fuel cost is precharged. As long as you return it with a full tank, you won't be charged for fuel, which is an option available when you choose to return the car with a full tank on QEEQ.

When I returned, I noticed that the price was different from what I booked online. I was in a hurry and didn't ask at the time. The car was a Skoda; I expected a Mercedes.