It is awesome! I thought it was dumb the first time I tried my mom's, but then to help her out one night I spent the entire night (while she was sleeping) cutting out a 2000+ piece quilt for her. My wrist did not hurt or cramp at all. There is no way I could have done that with a straight rotary. I bought one immediately! Probably one of the best investments in my quilting I have made. There are lots of cute gimmicks - this one actually works!