Madrid -> Seville -> Valencia -> Barcelona -> Ibiza

Quite satisfied, although my English isn't great.

The rental company did not force additional insurance, and the procedures were completed quickly. The pickup location was also very close.

Long queue at the pickup point, limited English skills, and upselling behavior; excellent service at the drop-off location, fluent English, and shuttle service provided.

The process was quite convenient. They asked for the order, driver's license, passport, and notarized documents, then only inquired about additional insurance (I guessed, as my English isn't great). I declined, swiped my credit card, got the keys (which had the parking spot number), and left. Originally booked a BMW 3, but got a new Lada with only 1700 kilometers. Returning the car was also very easy; I just said 'done' to the staff (non-native speaker), they checked the car with a device, and it was fine. Back at the office, they gave me a receipt.

Excellent experience, picking up the car at Madrid Airport was quick and convenient.