Have been using this for a while, use it to buy most things on-line, just login and click through to their partners and get cash back. Some of the deals are amazing, for example a month ago I opened a new ISA, pay the min of £50 a month into it for 12 months and they give you an extra £110 free, basically the commission on the sale. Means the return jumps from 6% to over 20%, cancel after a year and buy something else.
Did the same for home insurance, got £70 back. Car tyres, insurance, electricals, DVD’s, holidays, travel tickeets etc, if it’s something you’d usually buy on-line then Quidco will enable you you to get a cash return of some kind. Somehting are not cheaper obviously, there are probably some on-line stores which are cheaper and eBay still wins for some small things but things like insurance, financial services and travel where there is usually a good commission paid to an intermediary are usually very good payers on Quidco.
I use it all the time and get £60-£100 a month on average back from them for doing nothing more than buying the things I would normally and paying no more than I would normally. £100 a month is a track day or a cracking night out ;)