this move's pretty fun, but not too easy to apply in a match
it's useful for traversing stages esp. w/ platforms
if you want to do the arials with it and still jump afterwards, you have to press the attack button pretty much instantly. it's easy to do with fairs, bairs and uairs, but for the nair you have to press attack really quickly; as far as the dair goes you'd probably have to be landing on a lower surface to jump again (i didn't test that out).
i find it easier to do with b-sticking and z as attack; you can keep your momentum, and change the direction you face easily.
also, if you time it well enough you wont even see/hear the side-b attack.
hope someone finds this helpful =P