Is Density High effective for a double chin?

I've become quite interested lately because I've seen so many people around me getting Density High lifting. However, now that I'm actually about to get the procedure, I have a few questions about Density High.

I am curious to know exactly how Densorty High Lifting differs from other radiofrequency lifting procedures like Densorty or Thermage, and whether the pain is significantly more severe. I have a very low tolerance for pain. I would like to know if numbing cream alone is sufficient, if I need a local anesthetic injection, and what the typical pain intensity is.

I am worried about potential side effects, such as hollowing of the cheeks or skin sinking. Since I have a thin face with sagging skin, I am hesitant to make a decision because I am concerned that my cheeks might look deeply sunken after the Density High Lifting.

Lastly, I would like to know the duration of the effect and the appropriate number of shots.

It seems that 300 or 600 shots of Density High are commonly recommended. Please leave comments if you have actually received it, asking what the appropriate number of shots is for proper results and how long the effects last after a single session.

Roughly how much would it cost in the Gangnam area?