There is a restaurant nearby that I frequent. I saw a bench similar to this in their entryway. I took a couple of pictures, came home and started to create my version of the entryway bench.
There are several variables with any build. You could certainly simplify the legs, just make a gentle curve or leave them rectangular. I also added an optional drawer that hangs below the bench for storage. Templates are provided to make laying out the curves easier. The rungs (dowels) in the backrest could be replaced with slats or even make it a solid, the choices are only limited by your imagination. Keep in mind they are mounted at a slight angle.
As I have said before, plans are just a starting point. I don’t believe I have ever build a project from a plan and not put my own twist on it.
Enjoy the process!