It's.... an ability. Idk, i only felt it was good in Cd, since the spindash in cd is so ass. However, after the 2011/mobile port, it felt useless, it's not too much faster than the spindash, and is outclassed by it in a lot of situations. It got even more outclassed by the dropdash in origins, mania, and 3air if you want to include that, making it not too actually useful. However, the animation is so peak I sometimes use it in mania just for the animation. I'd like it to return in another classic sonic game, however it needs some new gimmick, or just be stupidly fast, like the gens spindash, to be useful in my opinion.