zafonic:
Like you I always get my o2 quido so I think it is pretty much guaranteed (for me anyway LOL) - Stonking deal if you ask me and smoking hot - Heat and rep added - Cheers :-)
Sadly, I have had several instances of Qudco not tracking and, sometimes when it did, not being paid, on almost £1000 worth of purchases, from several pcs. Their support was terrible. Although we pay for Quidco at £5 per year they really give little in the way of service. The other free sites are better value, if they offer the same amount of cashback.
I do recommend cash-back sites, but it's important to know that many people's purchases do not get the money paid to them that they should - this is when rules are followed ref. cookies etc.