Installed about 30 minutes ago, it already made me reconsider using the phone 3x. It is indeed effective while you're engaging with it. Hope it continues like this for long term.
For the long term, I recommend changing the prompts from time to time and adjusting intensity and cooldown settings. Sometimes even turning it off, so you are not getting used to the screen.
It will not last much. The brain will figure out the reconsideration is wasted mental processing and just proceed to open phone by clicking tool.