In my case it was very good experience. But keep in mind that in my case was included loss damage waiver for collision damages, scratches insurance. So all was good. I pickup my rent car (VW T-Cross) from the Saltsburg and returned can few days after in the Vienna Airport.
During the pick up of the car, agent tell me that checking the car dents and scratches not relevant for me due to that I have insurance for this kind of the incidents.
Return experience was fast but without of damage checking by the stuff, just park car in returning aria and leave keys inside, that's all. Soon I was received SMS with informed me that car is returned.
In conclusions I recommending to take insurance for scratches during rent period and all will be fine.