Well I have a CIS for my Epson printers and have not had any problems with it.
The price of that one you linked to seems a bit high to me for a 4 ink system. My Epson is a 6 ink system and cost me £27.35 from lpconline. and the company you are linking to are asking £43.99 for my printer so I don't see how they can call themselves cheapprinterink?
Check out ebay, quite a few on there from £29, mostly from Hongkong, but if you don't mind waiting?