Rated 3 out of 5 stars
Version 0.4.2 is lifechangingly good.
Version 0.4.2.2 is unusable. It includes the following new "feature": whenever you get blocked, LeechBlock deletes the URL of the site you'd been on from your browser history. Therefore, you can't go back and access it even once your block period ends. WTF? Strongly recommend clicking "See All Versions" and scrolling down to download 0.4.2 instead of 0.4.2.2.