I didn't think Mouse was as good as some people would say. Despite having an quite interesting plot, the execution was slow and sometimes even confusing, in a way I would wonder how some things could even make sense in the drama's universe.
However, the plot twists and the way the main revelation was "hidden" on the previous episodes were just chef's kiss – even if you had already gotten a spoiler (like me)
That being said, I would thoroughly recommend you to binge-watch it if possible in a 1.5 or even 2x speed, as you will forget what happened before if you don't watch it for a long time and also don't lose much of your time that way.
But if you don't want to watch the 20 one-and-a-half hour episodes, "Mouse: The Theatrical Cut" is a much, much better way to spend your time, as it summarises the drama.