If you're looking for an affordable and reliable replacement for the TN660 or TN630, look no further. I've been using HaloFox toners for a year now and they work great. That's great because as a musician I often have to print out my own songs for rehearsals and give them a professional look. The prints are very crisp, with no smudges or imperfections. I love that the instructions are right in front of you when you open the box (see image) - they tell you to gently shake the toner before inserting it for best results. I think they had a slightly different version last year and at some point updated it with a new plastic cover to cover the roller. It seems easier to remove and uses less plastic. A small but nice change that shows they are trying to make their product better.