I've been using them for about a year. It has been OK for me, but not flawless. You must take note that they do NOT guarantee your transaction will result in a cashback payment. I have received some nice payments (About £120 in all), but had a lot of trouble with one where it was just refused with a whole list of possible reasons. I argued the case, and was initially unsuccessful, but then out of the blue a week or two later, it suddenly got added as successful. That was in March, I still haven't recieved the cash yet, but hopefully it will arrive soon. I still intend to continue using, but it's very important to follow instructions very carefully to ensure transactions get tracked properly.
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