When we were waiting in line to pick up our car, we were scared as we heard 2 Americans travelers being asked to pay an extra 400 Euros or maybe it was 800 Euros. They asked to speak to a manager and it seems he came up with a solution that they seemed happy about. My guest is that they though the limit was 400 miles and not 400 KM.
My experience was good. We booked for a Renault Capture or similar and we had a Corolla 2022 Hybrid. The car had 2 very light scratches that were already identified. They however didn't identify 2 light stains found on 2 seats.
They was not much preasure to upsell us to take the insurance. We did ended up taking the unlimited millage option which turned out to be useless as we drove 400 KM (I guess the preasure came from the story of these 2 travelers and a mistake in our planing).
On the return, they will carefully inspect the car, specially the windshield (which is the only thing we forgot to inspect on pickup).
I would return to this location again and I highly recommand a hybrid car. We had a fuel consumption of only 4.5L and we filled for only 20L which ended up coasting about 65$ CAD (about 3.25$ CAD /L). Don't be cheap and pay the extra for a hybrid.