There has been a lot of discussion on this subject in this forum which you should be able to find if you do a search.
I have used JR ink for a couple of years without any problems. These days it also come with a flush which extends the life of the cartridge considerably. If you have a local Morrisons supermarket they periodically sell it on offer, buy one get one free. I have enough stock now to keep me going for quite a while.
Others of course will disagree.