I now had some say in use cartridges from other vendors. Often I had the problem that the chip has not been detected or the cartridges were reported to quickly empty. These cartridges are the original in every way - work perfectly, and the print quality is indistinguishable from the Orignalpatronen! Strong buy recommendation !!
Here is an addendum 04/04/2014:
Still very pleased. Even with longer periods of no drying and no pressure problems!