It may be great. However do you need it? Will it extend the life of the car or engine?
Unless you have some special need, like maybe driving it as a race car, I doubt if it will provide any meaningful benefit, unless you really like knowing that when your engine needs replacement, that some parts may still be almost like new, rather than half way to needing replacement.
How many times have you had to replace internal fuel or engine parts because they were not clean and shinny? When was the last time you looked the internal parts of your engine?
Don't worry about fixes for a problem you likely will never have.
Most of the time an engine dies, it is due to abuse or lack of maintenance as recommended in the owner's manual.