Does the sensation of Shurink vary significantly depending on the clinic where you receive the treatment?

I am looking for reviews to learn more about Shurink.
Even though it is the same procedure, the experiences were really diverse.

Some people said it was fine.
Because someone said it was more uncomfortable than expected.

Is there a difference in the equipment or procedure methods used from hospital to hospital?
I am curious if there is a significant individual difference.

What factors did you compare when choosing a hospital?

I would like to hear the experiences of those who have received it firsthand.