For the last five to six weeks, I’ve been taking part in the HP Ink Challenge. In the program, I was tasked with comparing HP 60XL inks with refilled inks. To do that, HP sent me some printing supplies, including two identical printers (Photosmart D110a). One printer was set up with HP ink, the other printer with refilled ink. Over a six week period, I had to print out a set of photos on both printers and compare the results. Bottom line: refilled ink can be significantly cheaper than HP ink. However, it’s a hit or miss situation. If you’re lucky, the refilled cartridges will work fine. If not, you’ll end up with bad prints and wasting a lot of time.