Is sculptra for the temples predictable/controllable?

I keep hearing that sculptra is excellent for this area. And that it is a long term solution. Though I'm also seeing that it takes 1-2 months before you see results. I'm a bit nervous about having something that forms a "web" and keeps "growing" over time injected into my face as it seems like it might not be easily controlled?? I'm hoping you could explain the pros and cons and a bit more how it works as it sounds truly bizarre to me. Also, is it safe? What is in it + can it be reversed? Thanks so much!