Not a drop, but print!

I do not know what other people have done wrong here, but my cartridge have not dropped and were otherwise perfectly fine!
So far I have only used the little black cartridge, hence only 4 stars because I can not judge the quality of the colors.
As described, no chip, but fully functional.
Who ordered this seller gets the offer to write a review and to receive a single cartridge free. I think is a fair deal.