Long ago I tried refilling cartridges for a Canon printer. In theory you save lots of money. I found that refilling a used cartridge rarely worked so I bought empty new ones. Even those did not work all the time. In addition, it was messy. It was very easy to spill or leak. In the end I went back to buying the OEM cartridges. Maybe techniques have changed or some printers are easier to refill so you may have great results.
Also, using 3rd party inks open up a can of worms. First, depending on the quality and type of ink, printers can clog more. Second, you may have to recalibrate if you are printing photos as the 3rd party inks don't have the exact properties of the original.
Hope it works for you!