My wife lays out books for a living and many include color images that need improvement. Once past the on-screen stage, it is important that the printer's output closely matches what is on screen. Along with some calibration, the consistent use of a the makers own toner unit is advised. For non-critical work, a refill may be fine. Only four stars because I'd like them to cost less!! Get the right tool for the job, especially if you paycheck depends on it.