I always use HP Ink cartridges they're not difficult to find or install they don't dry up or have inconsistent ink there is many knock off brands but my experience is its a better value to stick with the name brand and HP is as good as it gets.
This ink and the hp printer i purchased last year have proven to be essential to my business; I am a Realtor and I need to make a lot of copies and scan and send multiple ducuments up to 50-60 pages sometimes. I find Staples store employees very helpful and knowledgeable about their products and the products I need and have questions. I do appreciate too the program Staples has to recycle ink cartridges; it is good for the environment/ecology and also i receive rewards and coupons due to the program.