The staff in the UK were very polite, and the return process was quick as well.

At pickup, they said no cars in the same category were available, we had to upgrade. If not, we would have to wait for four hours, but I arrived at 8 PM, so I had to upgrade and ended up paying an additional £1000 for the 16 days.

The waiting time was within an hour. Not short.

I clearly rented an automatic car, but was told there were none available. I had to pay significantly more to rent an automatic car, which felt very unfair.

They could not check the car in quickly as it was a 30 day hire. I was there for almost an hour and a half whilst their computer gave problems. They then tried to bill me one day extra at a high day rate when I actually handed it in a day early! They then corrected this but I must look at my statement next month to ensure they did not bill me extra.