To replace the chip, I can only say that this indeed is obtained only the first time. When the chips scraped and times are on the template of the "fake" cartridges can you just hang up on the interface in the printer and never need to turn there again. The bad reviews I can understand in any way. The change of the chip is not heavier than pasting a MonoBlocks figure.
The colors I can only say that they are all tired and clear. The original yellow HP seems to me even worse;)
Regards,
Martin
(Printers: HP Officejet 6500A)