I've used this to purchase several Amazon giftcards. All purchases went through, and the cards were loaded with the promised amount (one or two £10 cards, several £25 cards). The main downside of a Cardyard sale is the minuscule discount for Amazon cards. A discount of only 3% is not much; I can get almost as much using an Amazon credit card. The small value of the Cardyard discount is probably due to the fact that they need extensive customer services operations to prevent scammers from using their platform. I see some reviews that worry about scammers; and since Cardyard cannot control what Amazon does with their giftcards, that's a valid concern. Cardyard doesn't obtain the cards directly from Amazon, but from private sellers, and what stops these sellers from redeeming the cards before the sale? For that reason, Cardyard is actively scanning for scammers, and reimbursing buyers in case. So that never happened to me yet; all Amazon giftcards that Cardyard sold me were legit and I could fully use them on my Amazon account. So I was never scammed; all my purchases went through just fine; but in case a future purchase doesn't work, I will rely on Cardyard customer services; and I hope they'll fix it. But the CS employees need to get a decent call centre salary; and that cost IMO prevents Cardyard from offering a bigger discount (12-15%) on Amazon giftcards. But overall, 4 star service; one star short of the 5 only because of the really low discount of only 3%.