Our family of 4 adults booked a car trip from Venice to Rijeka as we needed to pick up a rental car in Croatia so we could return in Croatia. I was a little nervous at first booking on the internet, however it was a great experience. Knopkatransfer was prompt and the van was very comfortable. The driver waited at our drop off with us to ensure we connected with our rental car. I would highly recommend booking with Knopkatransfer.