The previous version of this was a top lift, to access the cartridges. This unit has a front folding down panel for access. The left side of the face plate (just around the side to the left of the power button, has a raised edge for grip, pull that forward and down to get to your printer cartridges, it's easy! Also, give it a few seconds to slide and align the cartridge plate, it stops automatically.
I find that HP products are VERY reliable as printers go. Also the cost of the replacement cartridges is the most economical on the market. This unit uses the "63" printer ink cartridge for color and black.