Is there a big difference in feel between the 1st, 2nd, and 3rd playthroughs of Jubelook?

I heard that collagen accumulates the more you get Juvelook.

Usually, from which session do you start to see with your own eyes, thinking, "Wow, my skin has really improved"?

Is it just a slight moisturizing sensation during the first session?

I wonder if the pores or texture start to change significantly from the 2nd or 3rd session.

If anyone has experienced the process of seeing results session by session, please let me know!