Thank you for your reply.
I am dubious about CISS if I have to be honest and I don't really fancy having tubes and bottles hanging around the place. It only needs one clumsy mistake and then you've a right mess.
CISS looks great in principle, I just needed to have actual feedback from people...
Never looked at CISS systems before and have two printers - one is a brother MFC J6720DW which has chipped cartridges and the other is a canon IP4000 which uses transparent cartridges.
I used compatible inks before but they let me down maybe because I did not run the printer enough, so...