Beware research! I know of some handwriting programs that refer to research to substantiate their programs. The problem is twofold.
First, I know of research to determine the effect of handwriting instruction on the cognition of young children, the difference between learning keyboarding only, and learning handwriting as well. Some of this research has been noted in my earlier blogs.
Second, I know of no research that proves one program is better that others. If you know of such, please let me know. A reason why it may not exist is that it would require following a large number of students who learned to write with each of many programs from Kindergarten at least into high school. At least 9 years!
The best a school or individual can do in choosing a program is to select one that appears to have easy letters and numerals, ones that incorporate the natural movement of hands, and that appears to yield legibility.