We use
http://www.recordrentacar.com all the time now, always used to use autoreisen but found their cars were getting older & older. I book with record online about a week before we travel.
What was the car like?
Record advertise that all their cars are less than 6 months old.
Do they try to get you to upgrade at the airport ?
I have been upgraded when they do not have the car I chose - they do not charge you any extra though.
What was the queue like at the airport ?
I have never seen a large queue at the desk, (there may be on a Fri) - I always sort the car out before I collect the suitcases to get in the queue first.
We have to return the car early in the morning, has anyone else done this ?
You just park the car & put the keys through the window in the Record office at arrivals.