Made a booking online - 6 months ahead of holiday. Arrived at car hire centre at Warsaw airport. Was told that the booking had been cancelled without informing me. Had to rebook at obviously short notice with another supplier at a much higher price. On my return to the UK I complained to HA. Eventually - after much effort - received a refund of the original booking price - 4 months later. Tried in vain for months to get a refund of the extra approx £105 costs incurred for the new booking. Wouldn't use HA again - why book with this company when there's no guarantee they'll honour your booking and it will cost you a lot of money? Avoid.