I've used this supplier for quite a while and found the quality good and value good. The biggest problem with 'equivalent' cartridges tends to be down to your printer's embedded software - it tries to make life difficult if you don't buy 'supplier-original' cartridges. If fault messages appear, always try removing the cartridge and rub the contacts to ensure they are clean, and otherwise try swapping to another cartridge but keep the current one (if you think it still has ink in) to try at another time - keep some of the push on covers available to protect the ink from drying while you store them. It all saves a fortune so persist with these affordable cartridges.