I create cards of all kinds and find that I don't have to replace the cartridge as often as with others. I have had my 3510 Series Desktop 3 in 1 printer for several years and buying the XLs not only saves me money but saves me paper as I don't have to print out an alignment page as often.
I bought these over Christmas and the company delivered them quickly. The XL cartridges deliver superior quantity and quantity of page count over the standard or aftermarket cartridges. Well worth the money.