Are there people for whom the effects of Botox appear quickly?

I became curious while looking into Botox.

They say the effects usually appear after a few days.

I found that some people feel the changes faster than expected.

I am curious why there is such a large individual difference.

I'm not sure if it's because of my muscle mass or my body type.

Is there also a difference depending on the treatment area?

I am also wondering if it is good for the effects to appear quickly.

I would like to hear your experiences.