Being a military family we got to experience 5 different school
districts and pretty much 5 different approaches to teaching
handwriting. My 1st and 4th learned "stick & ball" printing.
The 2nd and 5th learned D'Neilian. And the poor 3rd kid started
with D'Neilian in K, we moved and his 1st grade teacher was
beside herself that he kept putting those silly curls on all his
letters. :-/ Both of the kids who learned stick & ball and
then cursive, still use cursive and have nice handwriting. The 2
that learned D'Neilian tend to print now (I think it's more of a
coincidence than anything else). I will say that the kids who
learned D'Neilian did have an easier transition to cursive, but
none of them struggled that much (except the one who had the
combo, his handwriting to this day is atrocious!).
As a preschool teacher I don't care for D'Neilian. It just goes
against my grain to make something harder for younger kids (when
their fine motor skills are less developed) in an effort to make
it easier down the road.