What do you think of the Rejuran treatment?

Lately, my skin has been feeling a bit sagging and rough.
I'm looking into Rejuran. I've been searching and it seems like it's pretty good for regeneration.
I'm curious to know what people who have actually tried it feel like.

I often feel dry and have fine wrinkles.
I thought it might help with this part. It's like a mark that comes up
I heard it would get better in a day or two, but it's not working in my daily life.
I also want to know how uncomfortable it is.

And how many times do you need to do it to see the effect?
I wonder if it's normal to do it in a 3-4 pack.
I would like to ask for advice on whether it is possible to use this on dry and sensitive skin without any problems.