I use Quidco regularly and have done for years. I also now use my Santander 123 account for cashback - no only do I get cashback on utility bills, they have numerous cashback offers at retailers just by using your card. One that recently finishes was 10% back at Morrisons - if you already shop there, a bargain. Quidco now do an account that is free of charge - as opposed to the premier account at £5 a year. It really is money for nothing.