Although we try to avoid printing, there are times when we do a lot of printing on our HP printer and the ink cartridge runs dry. Just recently updated and printed 30 copies of the golf club manual and 2013 calendar (+numerous drafts for proofing) for our Lady Niner golf organization. A year ago would have me running for new cartridges costing $50-80.
I can't afford to replenish my printer with original cartridges on a regular basis and I certainly do not want to add to my trash with plastic cartridges. Costco has an onsite refilling service saving me more than half the cost with little effort and decent results. The recent refill for the large black cartridge cost $9.99.
For you naysayers, claiming a loss of quality…the quality is no less than a new cartridge. Less cost. No trash. I call that a win-win.