I rented from Hertz. The staff had a bad attitude during pick-up, and the first car they gave me had a broken multimedia system, so they replaced it. There was a border crossing fee of several dozen euros from Germany to Belgium.

There were no cars available at the store, and the staff never showed up. There was no compensation plan provided.

Excellent

Pretty good, very enthusiastic, and didn't try to sell any additional insurance.

Like: The prices are rather competitive (typically lower than in some other broker agencies), the service is excellent, the staff are always available through the live chat service, the free cancellation is a very useful option, the price includes exactly what is specified, and we did not pay any additional costs at the desk of the rental agency.
Dislike: In the rental agreement, it was specified that “cross border is free of charge”. It happened that due to the miss-communication between the rental and broker agency this cross border was not free of charge. However, the EasyRentCars accepted to reimburse the cost, and it turned out to also be a positive experience. We are thankful to EasyRentCars.