How many shots of Density do I need to see proper effects?

I am looking into getting Density.

However, it is difficult to decide because the number of shots recommended varies from hospital to hospital.

Some places say that a moderate number of shots is sufficient for the entire face, while others recommend more shots if you want to be thorough with the jawline or cheeks.

Since there is a price difference, I am wondering if it is better to receive as much treatment as possible, or to focus on the areas that need it.

What I want is improved elasticity in my cheeks and jawline, plus a firmer overall skin feel. However, since I don't have much fat on my face, I'm a little worried about getting too much treatment.

For those of you who have tried Density, how many shots did you receive?