This deal is excellent. When I browsed through the offers in the Ib plus site i almost got a heart attack on Monday. Then, a moment of disbelieve: this has to be 1800 Avios and not 18000. After reading (and re-reading in English) the T&C, I realised the offer is legit. Now thinking where to get the car from. Obviously in Spain more expensive than a normal weekend due to national holidays.
Happy driving (and flying)!