I am having a terrible time finding an ergonomic rotary cutter that feels comfortable for me. My local shop doesn't let customers try out the cutters before buying. I am leaning towards the Grace company's Comfort Cutter or True Cut with the ruler guides. I did try a Martenelli cutter that my friend swears is the best she's ever tried. Planning a shopping trip this coming weekend a cutter is the #1 item on my list. Any advice on this would help.