I took a seven-seater Opel Zafira from the guys for a trip to kopaonik, with two child seats. Everything went great, no complaints. The washer is there, the headlights are working, the car is clean, everything was explained, they helped to lay out the seats.
They can bring the car to the point to the client for a fee — it is very convenient.
The cars are typically old for Serbia, but technically in order. My mileage was 200k km, there is still somewhere to go. On the other hand, these cars are not expensive and even the destruction of such a car the budget will be able to survive without disasters (although it hurts).
In short, I recommend it.