No seriously, printers that will only accept cartridges of the printer's brand are a scam. You'll get the printer cheap, and it might even come with a set of cartridges, but then they'll run out or dry out after a month and you'll begin the cycle of forking over hundreds for new HP-brand ink cartridges.
To make matters worse, HP is the king of bloatware. Every one of their devices comes pre-installed with tons of data-collecting software that you absolutely do not need. Somehow they've managed to extend this even to their printers.
Avoid at all costs. Gods help you if you already have an HP. Colours are nice though.