The pick-up and drop-off procedures were simple. There's a free shuttle bus from the airport terminal to the car rental office. I had booked a Vauxhall but was given a Peugeot 308 diesel with only 2357 miles on it, basically a new car and in good condition. The staff at the car rental company were very courteous. However, the company should improve by ensuring the car has sufficient AdBlue and by informing customers about the AdBlue warning light. I had never driven a diesel car before and had no idea about AdBlue. After driving over a thousand kilometers, the AdBlue warning light came on, and I didn't know how to refill AdBlue. Consequently, I had to stop by the roadside to check the warning signal and look up its meaning. The car wouldn't start, so I had to call QEEQ and the rental company for roadside assistance. After waiting for more than 3 hours, the rescue vehicle arrived. The technician went to a nearby gas station, bought 10 liters of AdBlue, refilled it, and the car was back to normal. The cost for AdBlue and the assistance fee were covered by the rental company.