THe best super unit is redundant. They are just an upgrade that make already great units (Accept for marines) better. If you ask me their appearence in the game is stupid and i personally don't see their point. Anyways, the ODSTs are the best super unit simply because of their ability to offer so much more than otherss in terms of covor and hooks and the ability to hot drop them. That doesn't mean they are the best though. each one has its own situations in which it performs very well.
If you say PLZ because its shorter than please, I will say no because its shorter than yes.