Lessons learnt on cross border experience:

We reached the car rental office much earlier than expected as the custom clearance was much smooth than expected and our flight reached the airport earlier than expected. When we requested if we can collect the car earlier (it was only 1 hr earlier ) with the offer and promise to return an hour earlier than expected time , we were told that we had to pay 15 Euros more which I declined. When I returned to the counter at the agreed pick up time later ; to my surprise the car was not ready as it had to be sent from another terminal . The waiting time was more than an hour and they did not offer any sincere apologies nor express sense of urgency . This resulted me in spending more than 2 hours in total waiting for the car ! :( .

Booking via QeeQ was quite smooth ; though I bought comprehensive insurance too via QEEQ I was told by recordgo that it does not cover full insurance if I had cross border journey ; which was what I needed . At the end , to be on the safe side I bought insurance from RecordGo as I wanted piece of mid when I crossed the border into France . Perhaps I need to be more careful with insurance coverage on cross border journey and full support