I'm using a Canon IP4500 printer which I've only had a few weeks and I thought I would try a CIS kit which I got for £25 on Ebay. I checked this guys feedback and they were all positive saying the ink is just as good as the Canon ink. I haven't installed it yet but would like to hear your thoughts if you've used 3rd party ink.
I have read elsewhere with problems of clogging but iv experienced this before with my old epson printer using epson ink in fact, it was the clogging that lead to the death of that printer as I spent a whole day trying to get it to print properly and in the end I took it out to the garage and pulverized with a hammer ED: patience boy patience!