How effective is Sculptra?

To what extent can I actually expect results from Sculptra, and is there no possibility of my face changing unnaturally?

I understand that unlike conventional fillers that instantly add volume, Sculptra is a procedure where the effects appear gradually as collagen is produced over time.

In that case, I am curious about when I can actually feel the effects after the procedure, whether a single treatment is sufficient, or if I need to undergo multiple treatments.

In particular, I would like to know how effective it is for sunken cheeks, nasolabial folds, and improving the elasticity and volume of the entire face. I also want to know if the volume and elasticity improve naturally, rather than simply making the face bigger or plumper!!!