The thread cutter saves me time because I'm not continually groping for my scissors and then putting them back. When multiplied out over the course of all the snipping on a larger quilt, you might save more than an hour! It also saves you thread because I can just start sewing again without having to pull the threads up. No nests, no unthreaded needles. Maybe some work better than others? It is one of my favorite new fangled sewing machine features.