Depends, is it the black or the colour cartridge?
If it's black you might be alright, colour cartridges seem to vary a bit, the colours won't look the same as the proper ones.
I bought one for my old Epson from CartridgeWorld and it wasn't great. Ended up ditching that printer anyway as it was almost as cheap to buy a new printer than to buy more ink for it!
I recently bought a Tesco brand cartridge for my current HP printer and that died after just a couple of prints, but I've been having issues with this printer, so it might not be cartridge's fault.