Do your research. Some are better than others. The main issue is they tend to clog more, and can even damage the print heads. The colors aren't usually that much different to the naked eye. I would never use them on my expensive photo printers, but I use them in my cheap desktop printer all of the time. They don't last as long as the genuine inks, but they cost a fraction as much and I just use it to print shipping labels and other documents. All in all, they're not as good of a deal as they at first seem, but I think they're still cheaper in the long run, provided you don't have a print head disaster.