It is a high quality ink that is more productive than the fuel gauge indicates. So use as long as the cartridge will print. For those who like me, color printing needs irregularly and relatively rare, the integrated into the cartridge print head turns, as an advantage. The same renewed with the cartridge printhead eliminates frequent cleaning processes which requires a central printhead and cost a lot of ink.
The CL-541 is due to the integrated printhead more expensive, but worth it, especially for the XL size.