Had to return the car early due to a family matter, but the additional rental fee, cross-border service fee, and insurance were not refunded at all.

Picked up and returned the car at Prague Airport, the staff at the store were quite friendly

Expenses are not transparent. Be cautious when choosing the Hertz branch at Prague Airport. They deducted a 20000 CZK pre-authorization for two small scratches!

I rented a GPS from the store for 8 euros per day, but it had no signal when turned on. The reception said it would work outdoors without issue. However, it didn't work outdoors either. I drove a bit but still no signal, so I had to go back to exchange it. Everything else was fine.

Like: I liked that it was possible to get a great last minute deal within my budget. The reservation desk guy was helpful and friendly. We got the car as scheduled with no delays or waiting.
Dislike: We booked VW golf class and got a Seat (not sure which make). It was kind of a nice upgrade. However, this car has very uncomfortable front seats. It has nothing to do with Budget, just a thing to keep in mind.