Sending speed, original quality without surprises, prices exactly, Amazon back guarantee 30 days what more do you want? I highly recommend the original Canon cartridges. One downside: a pity that Canon has decreased the capacity of these cartridges compared to those of my MP610 ... even if the cartridges are slightly less expensive, we are losing the final price / capacity and lower self so we faster and often out of ink! (Therefore provide to redeem in advance).