Is Shurink a good lifting treatment for beginners?

I've heard a lot of recommendations for Shurink as an introductory lifting treatment. What are the actual effects like?
I am also curious if there is a big difference when compared to Ulthera.
I would like to know if this procedure helps with jawline refinement or double chin improvement.
I am also curious about the extent of the pain and whether it is bearable.
I would like to know if I can feel a change after just one session, or if I need to do it periodically.
I would appreciate opinions from those with experience on whether Shurink is a good choice when starting a lifting procedure for the first time.