I brought these along with the Brother A3 printer earlier this year. They are inexpensive and produce output that looks identical to that provided by the original inks. Curiously, in photo mode I think they do better on glossy papers than the originals. Maybe I was just lucky. But on the three sets I've now used, I'll carry on.
The only fly in the ointment is the £4.95 postage, which is added to every item you order effectively raising the price if you order more than one set. Maybe it's the way Amazon works, or maybe it's a greedy seller, I don't know. But it leaves an unpleasant taste of overcharging for delivery.