I use Epson printers and 3rd party refills are fine if like me you print 100+ sheets per day, we only print website orders or paypal invoices and once picked n packed we file them (I.E> we don't leave them in the sun) and we hold them for 3 years (Accounts) and after 3 years the print is still fine.
If your printing Photos or materials you need to keep in direct sunlight for a long time maybe best to get OEM, otherwise 3rd party is fine.
I use 2 types of cartridges and they have 50% more ink than OEM and they only cost 95p each (including shipping) rather than £8 each for OEM.