This command move is on crack. It hits overhead, knocks down, and is really fast for an overhead. But careful: like just about everything else, it can be punished, and the range is iffy.
slow and can't combo afterwards. Avoid.
Fantastic anti-air. Great range, great damage, great priority. Use and abuse.
It can avoid some short-range moves on startup, and doesn't appear to be unsafe on block. But the best thing about this move is that it can combo into 623+K.
It'd be good if it weren't for the bad range, but avoid. It's fast enough to combo, but you'd have to be stepping on their toes.