CarJet

CarJet's web based car hire system is the best way to hire a car in spain. Just book online (you can pay on arrival if you want) and drop into the office at your destination airport. It's as simple as that.
I must admit I was impressed with the clear no nonsense web site which gave prices with no hidden extras. Bookings are confirmed by e-mail and you are sent a receipt and booking voucher which you present on arrival. Here is the web address http://www.carjet.com.
I was apprehensive about the booking, I thought it just cannot be this easy, I booked the smallest car available and Ford Ka for 13 days it cost £129, which is a really good deal. The only extra you pay is for a full tank of fuel, you bring the car back with as little fuel in it as possible, ok they make a bit on the remainder but who cares at Spanish prices. I needn't have worried everything went smoothly. The car was new and clean and all I had to do at the end of the hire period was park it in one of the companies bays shown on a map and drop the keys into a post box at the office. I would highly reconmend this company.
http://www.carjet.com