The habit of opening a tab with CTRL + T, typing in "twitter" and pressing enter is still a thing, but with this extension, I might get rid of it.
Even after just a week, I notice how many more hours I save with it.
Not every hour turns into a productive one, but it's definitely better than endlessly scrolling social media or watching the 14th YouTube video for the day.

Some critcism and feedback:
1. The UI for the options is okay.
1.1 A more modern UI would be neat
1.2 Minimalistic/advanced view - making it easier and less overwhelming for people to get started
1.3 More "?" that when hovered over show explanations.
2. Pre-made examples for time and amount of hours for a certain period
2.1 Provide a short quiz "How often do you think do you waste time?" or "How much time do you want to save?" and depending on the 3-5 potential answers, the extensions sets up the most common settings.
3. Automatically suggest the most common websites to block.