While great quality for the price, I've had recent issues with the ink being completely dry when opened. They were good enough to send replacements, but I had to return the bad ones first. Only problem with this is when your printer is dry and you open a new packet and it too is dry, you have no ink until the originals are mailed back and you have to then wait for replacement cartridges. Being without ink for 2 weeks wasn't good.
PROS: Great quality (90% of time), great price.
CONS: Get a dry one every now and then. Returns work but your are out until they arrive.