So useful it is !
I used to surf the Internet and waste much time on it, so that I was concerned about my ability to control my time well.
After finding it,I started to lock some websites in order that I could focus on my current task instead of disatracting.It is the extension that I would appriciate a lot.
However,perhaps due to not being familiar with it,it is troublesome to set up some functions.
All in all,it is a very useful extension.I like it.