To save ink should be the printer is not connected to a power saving switch socket because the printer after restarting a full print head cleaning performs, which can have an ink loss of some ml result.
In the ultra-low standby power consumption of our printer and the ink unfortunately horrendous prices that is an unambiguous statement. In an identical printer with power saving switch socket cartridges were empty after about 6 months!
Conclusion:
5 points for the super quality and durability 1 point deduction for the price. (As with all brand inks)