Use long Canon printer with the same high-quality paper and with both original inks as well as various compatible. Until now, without any problems. For more than 1/2 year I run a MG5250 and am now switched gradually to the Peach Ink. The last cartridges, I have now changed the two were black. And suddenly smeared printouts. I made a test pattern printing to clarify and lo and behold, it's up to the PGBK cartridge. Smeared extremely well on a second, different type of paper.
So not to use!
UPDATE 2012: the colored cartridges had now made trouble. Although sufficiently charged the print result was poor, everything clean has nothing helped. After switching to original ink immediately top again.