How long does the density effect usually last?

I found out about Denserty while looking into lifting procedures, and I keep debating whether to try it.

The procedure is more expensive than I expected, so I am most curious about how long the effects last.

If you look at reviews, some people say their skin became firmer immediately after the procedure, while others say they felt the effects gradually improve over time.

On the other hand, there are also stories of people saying they were satisfied at first but seemed to go back to normal after a few months, so I am curious about actual experiences.

In particular, I would like to know how long the improvement in elasticity, such as the jawline or sagging cheeks, lasts, and whether the skin texture and firm feeling also last for a similarly long time.