The leaking cartridge concerns we have experiences have mainly been with older, or neglected printers. The head tolerance is much lower the older the printer gets OR lack of maintenance has been performed OR worse yet, letting a printer sit around without use for extended periods of time. There has been several threads on this topic here on the forum, I would assume that is where you have determined that
a lot of people have had trouble with yours
When these problems arise we try to solve the problem before throwing replacements at the printer. The excessive usage of ink leaking from your printer would have MORE then noticeable. You would have seen dripping of ink all over your prints, this problem normally presents itself in a very quick manure, leaving no room for oversight.
It is possible you have a faulty cartridge or maybe 2, but it's rare. Considering I use on average 50+ FULL SETS of these cartridges every year for testing in our R2880 and have only literally had 1 faulty cart, I find it very hard to believe you have 3 + leaking cartridges and you didn't notice a problem until your ink was gone?
I need to get some back ground information on your printer before we go any further. To help me diagnose this problem, please answer these questions:
1.How old is this printer?
2.How often do you clean the Capping Station, Wiper Blade and bottom of the Print head?
3.How long does this printer sit without use with pigment inks installed?