Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Faulty ink levels

I checked my 'empty' cartridges against one another, and they vary considerably in weight; I contacted Epson who confirmed the levels are based on use rather then actual ink level; additionally, even though I print B&W; 99 percent of the time, even on the 'economy black only' setting my colors get used up; customer service stated that was because the printer uses all the colors even when 'black only' is selected. Bottom line, Epson's system is not environmentally efficient, as it wastes a lot of ink.That said, the ink and cartridge itself are mostly pretty good, though expensive (so they should be).