The car wasn't cleaned before being handed over, the floor mat was sticky and there were many crumbs.

It's acceptable.

No need to line up, pickup was immediate. They tried to upsell insurance, but we had already gotten full coverage through QEEQ, so we didn't buy the insurance they recommended. The rental staff didn't provide any introduction to the car and simply handed over the keys.

The service was very good and the staff were friendly.

The attitude was outrageously poor. I booked a Mercedes but they gave me a Hyundai, insisting it was the same class of car. When I argued, they said either take it or cancel the order and rent from another company. Ridiculous... After returning the car, I went to the office for a receipt. They promised to send it by email but never did.