These arrived promptly so cannot complain about the seller - however we did have more than the usual (with inkjet printers) problems getting the cartridges to work properly. They did work after lots of cleaning and then worked well. Although they were advertised as 15ml we found they did not seem to last very long. We always weigh cartridges full then empty and found that whereas other cartridges we've used dropped by 8gm (of usable ink) these only dropped by 7gm (one gram doesn't sound a lot but it is a large percentage difference). It is a pity that the company selling the re-settable tanks have been forced out of business by Epson - we used to get 10gm in those.
So, worked well after some initial teething problems, but a bit "light" on ink we thought.