Avoid the HP Instant Ink package at all costs. HP make it sound lovely and welcoming when they offer you the Instant Ink Package - have 2 or 3 months free - its lovely. Except, it isn't lovely and HP turn it into a form of corporate blackmail. I subscribed to the service but had to cancel months later when I moved to a serviced office where technical problems meant I had to opt out of wireless printing. This meant that I had to leave Instant Ink. At the point where I left, I had 4 HP ink cartridges in my printer (3 of them nearly full) plus 3 new, unopened HP colour cartridges and I hadn't used the monthly printing allowance I paid for in my subscription. A few days later I went to print and got a message saying the cartridges wouldn't work as I no longer subscribed to Instant Ink. I was livid - they were HP cartridges in an HP printer. I then bought some non-HP cartridges for the printer. When I went to print I found this message in my printer screen " The indicated cartridges (all 4 of them) are blocked because they contain a non-HP chip. Replace to continue printing..." At this point I had 11 ink cartridges for my printer but could not use any of them to print. I phoned HP and asked for an explanation. And what an explanation I got!! It went like this ........The 7 HP cartridges in your possession have been supplied to you under the Instant Ink system and can only be used under that system. They will work in your printer once you re-subscribe to Instant Ink. I pointed out that this was not clear from the start, that I could not re-subscribe to Instant Ink for technical reasons and so had 7 HP ink cartridges that were still full of ink but were of no use to me. I then asked the Customer Service Assistant to explain on what basis HP had decided to block the non-HP cartridges, leaving me with a non-working printer. He said that the printer would work once I had installed HP cartridges. I pointed out that I had 7 HP ink cartridges that had been blocked by HP and he repeated his spiel about the Instant Ink system again, I then asked him to let me know the legal basis upon which HP was blocking my use of my printer becasue of my use of non-HP cartridges. He said that he couldn't discuss the matter, as he could only discuss HP products. I pointed out that HP had had no qualms about blocking the non-HP cartridges so should be willing to provide unhappy customers with details of the legal basis on which they did so. he parroted the line about not discussing non-HP products again. I asked him to put me through to the Legal team so I could put my question to someone capable of dealing with it. He wouldn't. End of phone call. HP's behaviour smacks of corporate bullying, with a strong touch of cowardice when it comes to defending their decisions.