If you want to switch to 3rd party ink, at least go with a reputable company such as nazdar, triangle or maribou. Don't forget you are putting this ink through a very expensive machine with print heads that cost 10 times more than any savings you might get by switching.
My personal rule of thumb is unless you are changing out ink cartridges daily, the risk of using third party ink is too high for any savings to be worth it. If you get a damaged print head while using third party ink, who foots the bill, you do.