I'd give it a full 5/5 if it came with some newbie instructions. I'm just lucky I've used refillable cartridges in other printer before. It wasn't too hard to figure out what I did wrong when the printer threw me an ink system error (I found the YouTube video on how to clear the error) I was able to get the ink flowing right by getting the vent going. First time you use these take the fill plug out and use an unused syringe without needle to "blow" 1ml of air into the vent hole gently. Remove the rubber vent cap for use -- you may want to keep them in the box as if you need to store the ink cartridge if you ever move it will keep the ink from leaking. I haven't used the black cartridge yet, but I fit just under 20ml of HP ink in the colour cartridges. Online I've researched: 951 XL 18ml 950 XL 45ml Make sure you only remove the cartridges to refill them as the ARC chip will reset. If you're having any issue with the ink levels shown, you may have to insert another cartridge and then swap back. I have two of these printers so wasn't an issue for me. I recommend these refillable ink cartridges if you've already got a better printer for business use and/or now let your kids print things. The HP DYE ink here should work well with these cartridges. about 5 refills a cartridge, about 2 for black.

Sturdy and easy to fill. No hardware issues. Doing maintenance on the printer so haven't tried in machine yet. As advertized.

Se remplie bien fonctionne bien