The prices of density vary so much, what are the effects?

As I've gotten older, my skin has lost elasticity, so I've been looking into lifting procedures. I've heard that Density is effective and less painful, so I'm interested. However, when I looked into Density prices, I found that they vary greatly from clinic to clinic. Even with the same number of shots, some places charge nearly twice as much, so I'm confused about how to determine the right treatment.

I'm curious if the price difference between Density treatments is due to the machine version or the practitioner's skill level. I'd also like to know from those who've actually undergone the procedure how effective it is and how long it lasts. I'd like to hear realistic reviews, not exaggerated information like in promotional articles.

I've looked up pre- and post-procedure precautions, and they all vary, which is confusing. I'm curious about whether I should avoid other skin care products or laser treatments before the procedure, and what post-procedure care I should take to ensure a quick and pain-free recovery. I also have sensitive skin, so I'd like to know if side effects like swelling or breakouts are common.

These days, the price of density treatments varies so widely that it doesn't seem like the cheapest option is necessarily the best, but it's also a bit burdensome to find one that's too expensive. If you've actually tried it, and you have any thoughts on what price range is appropriate or any helpful information to know beforehand, I'd appreciate your advice.