When I teach quilting, I take my tools (well labeled) to class with me. I have 2 or 3 kinds of rotary cutters, mats of varying size, markers of different makes, several different manufacturers' rulers, etc. I encourage my students to use my tools for 2 or 3 weeks and THEN they go and buy their tools, knowing which ones they like best, which one feels best to them, which ruler they can read best, etc. A lefty sometimes needs different rulers than a righty. I don't want my students to spend lots of money on tools they can't or won't use. I have had any complaints yet.