I have a SX400 and not wanting to buy the brand of my printer (as you can imagine for reasons of cost), I turned to compatible. After a few setbacks with cartridges bought on the net (clogged print heads, poor color, etc ..) I tested these cartridges for a month and after a few tens of prints (color and black and white) j 'am fully satisfied. (Durable, good quality color and do not clog the print heads !!) Hoping that this comment can help you ...