It seemed too good to be true: Heathrow parking for quite a bit less than the competition. And so it turned out - too good to be true. Parking lot was so far from Heathrow that it took 20 minutes for their transfer bus to get us there. On the way back we had to call their automated 0845 number (expensive from a mobile: 020 would have been free) just to hear a message saying they were en route to pick us up. They left us waiting at the bus stop for 30 minutes at 3 degrees C. We won't be using them again.