Good by not great.
This little utility does what it says it’s going to do. For the most part. Unfortunately for a multiple monitor setup it seems to be MORE distracting. I have a 12 inch MacBook connected to a 24 inch Dell 4K monitor. When switching spaces on the 4K monitor the background of my MacBook screen brightens and then dims again necessarily. It’s like the app doesn’t remember which app has focus so when you switch to a space it has to figure it out and dim the background all over again. I suspect if one doesn’t use a multiple monitor setup at all or if one did and but didn’t use the Spaces feature this wouldn’t be an issue. I’ll be turning this off but I’ll keep the app around just in case an update addresses this problem.
@owells about HazeOver • Distraction Dimmer™