i use this scarcely, but it brings me out of tough situtations. akuma was str8 rushing me down, then i reversal SA2’d my way out of an air fireball and it caught him while he was on the ground and did the whole combo, meaning he went through the fireball too. i was in the corner, so that put him there after, then the rape began.
also i find this useful vs makoto, well actually vs any rush character. vs yun and yang, it knocks them out of the air if they dive kick you, and i like to partition a s.mkxxhk stomp to cross up.
another thing is, i know it has to have some invincibility frames, since it went through a fireball, but i have NEVER been stuffed at the startup of this move. like chun’s b+hp would perfectly be placed, and the first hit of this super still hits chun punishes.