Horrible service and refused cashback
Budget likes to add insult to injury. We booked a car rental via Quidco for holidays - only to be told once there that the car wasn't available, and were "offered" an upgrade which would more than double the price!
After 2 hours of waiting, they finally gave us a free, smaller upgrade, but didn't mark on their sheet that the car was damaged - thus trying to charge us for repairs when we returned the car. Thankfully I had taken pictures when we picked up the car!
So just to cap it off, Budget have now rejected the cashback for no reason whatsoever.
Hence the cashback is a con and they are more expensive than you'd expect!