Sorry for cross posting, this is also on YD. I'm hoping Christian has an opinion:

My ink needs replacing on my Canon iP4500 printer - god the ink's expensive. Anyway, searched the net and came across sites that sell continuous ink systems, like this one Canon IP4500 continuous ink supply system - IP4500 Continuous Ink by cityinkexpress Ltd

It sounds too good to be true; this is 10 times the amount of ink for the best price I can find proper Canon inks! Anyone any experience of these? Any reason why it's a bad idea (other than it's not Canon ink)?
Rob

PS anyone know anywhere that sells Canon paper (preferably the top notch PR-101) in bulk? Best I can find is 15 sheets for about £8. I'd like about 100 or so sheets at a reasonable price.