Could pick up the car even though we arrived early!

Pretty good

First, the front desk staff were impatient and not friendly. Poor service. Second, I asked for a car with more space at pickup and tried to communicate this several times, but the front desk refused. Another thumbs down. Third, I reluctantly took the car. Upon inspection, I found a small dent on the rear bumper, took a photo, and informed the front desk staff who told me it was fine and didn't note it. When returning the car (which had no incidents during use), the staff blamed us for the dent. Even after showing the pickup photos, they ignored our explanation and recorded it as our fault. Thumbs down again.

Very easy to find. From taking a number and queueing to getting the keys, the whole process took less than 5 minutes.

Like: Clean car, matched the size we had ordered although not the brand. Easy to collect (after the long queue) and drop off at Munich railway station although you need to keep your eyes peeled to find the drop off garage.
Dislike: We queued for nearly an hour at Munich airport to pick up the vehicle even with the ticket system. The ticket machine needs to be more obvious or at least a more obvious sign.