I thought the price was amazing for this product since the total for 5 cartridges was less than the price of a single Canon brand cartridge. I installed all cartridges together on my S630. While the black cartridge worked fine, the color ones kept dripping ink from them after only a few weeks. Eventually, when I realized the bottom of the print head was saturated in ink from the color tanks, I just removed them and replaced them with the previous empty ones. To make matters worse, my printer stopped working all together because I needed a new print head. The new print head cost $52. My printer is an older model, but the timing was suspicious. In the future, I will stick with Canon brand.