Everything. Orderd through them a 7 seater to be picked up in Budget at a location in Manhattan. When we arrived no car available , they claimed Holiday Autos cancelled the reservation. Called their customer service, the Agent stayed my reservation with them was valid but was completely helpless in helping with Budget. I had no choice but to go to a different location at JFK as there they had 7 seaters, and pay over $500 extra. Holiday Autos simply refunded me for the payment but refused to take issue with Budget and simply ignored all my attempts to contact them. Basically there is no effective recourse on an internet broker located on Ireland. Never Again use them. Beware!!