In reply to Dave Reeve:
Hi Dave
Not hired from Rues but I recently hired from Alicante and had the same debate over Goldcar. Having read lots of negative comments on forums about their hidden charges and also read their terms and conditions the empty fuel tank policy (ie. you pay for it regardless) and the additional service charge put me off. I ended up going with hertz, which I felt was good value. There were no surprise hidden charges and you had the option to return with a full fuel tank or bring back empty and pay for a tank of fuel (€67 for a corsa). Taking out AA excess car hire insurance £4.50 a day (there is an annual cover option) safeguards you from being stitched up by the hire car company's ridiculous excess charges should you not take their additional insurance cover, normally at an extortionate cost! There are cheaper options online from around £3 a day for similar cover to that offered by the AA by the likes of money supermarket.
Hope that helps
Iain