The local car rental company I used was quite good.

Highly satisfied

I would have appreciated some documentation upon the car's return that the car was indeed returned in good condition.

The car felt like it had not been serviced in a long time. It was clearly quite old. The drivers window was broken, so when it was opened and closed it ended up breaking the window seal and allowing wind, snow and rain in. The drivers side brake light didn’t work when it was handed over (realised the second day) and the windscreen wipers should have been changed. Driving in Iceland we had to contend with snow and this car needed to be in far better condition than it was.

Fine - no issues.

Staff members were incredibly polite, friendly, and attentive. Car presented previous damages and had minor issues (no usb/aux/Bluetooth; passenger's window would not seal properly and would slowly go down every 15 mins)