Avis car hire
Joined Quidco after a recommendation.
My second purchase was car hire with Avis which has been declined as cashback (approx. £44.00). Hopefully I will be able to return to this review and write a complementary article of the whole process - currently though that is not the case.
As for Avis, they were great. the online booking was easy. Collecting the car in Houston Texas was simplicity, drop off too was hassle free - which is exactly what you want before catching a 12 hour flight home, just need whoever to sort out the payment.