If you are power user, then this app is recommended. If you know what you are doing, then it can gve u more control over the phone, especially with some simple adb commands.
For example, I dont want the default timeout setting and I want to set it to different screen timeout at different time of the day, I can make use of the custom setting to make some basic system changes.
If just normal user and dont like to fiddle around too much and use phone out of box, I think maybe not too relevant. Already have Modes and Routines which are probably more user friendly.