How many weeks does it take for the effects of Sculptra to become noticeable?

Lately, my face doesn't have the same volume as it used to, and my cheeks, in particular, seem to be sinking in a bit, so I'm looking into Sculptra.

I heard that it isn't a procedure that creates volume immediately like fillers, but rather one that induces collagen production over time. Because of that, I can't quite get a sense of how effective it will be.

I've heard that the volume appears due to swelling immediately after the procedure but subsides later, and that you can only feel the actual changes after a few months.

For those of you who have actually received Sculptra, did you notice a change in facial volume a few weeks or months after the procedure? 

I'm also curious if I can feel a change after just one session, or if I need to receive it multiple times.

I would appreciate honest reviews from those who have experienced this firsthand.