It works almost perfectly. I hate it. Uuuuuugh, guess I'll go back to work. Anyway, it's 4 instead of 5, because the temporary unblocking feature doesn't seem to work. The icon is yellow and everything, but the websites aren't unblocked.
Edit: see developer response, it was user error.

Bescherm je zelf tegen afleidende websites zoals zogenaamde "sociale media" en nieuwsmedia.

Set a timeout and block sites for a duration, then refresh the time limit. Plus tons of customization for every combination of limit - limit during a set time of day, or set limits /except/ during a set time of day. There are even thoughtful and creative options for making websites unpleasant to use to wean off of bad habits without going fully blocked. Everything I could ask for plus gave me some new ideas for how to manage my time and break my bad habits. I'm fully impressed.

Very good blocker. Exceeds expectations.

Designed quite well I'd say

easily customizable and helpful features. saved me a lot of mental energy on time wasting sites!

nice

The 10 second wait time is enough for me to not mindlessly browse reddit.com/r/all Thank you very much James

Perfect. Just perfect to me. LeechBlock ist helping me keeping the balance between my need for information and work. As i'm working in a browser environment nearly all the time, all the news sites are only 1-klick away. I'm using it for about 2 years now. I'm allways surprised, how often i subconsciously try to open a news-site and then, luckily, are blocked by LeechBlock. Thanks!

Very configurable and works well.

This little bad boy helped me to manage my time and save me from pointless websites

Very helpful for students like me, especially now since everyone is studying online.

YAY! FABULOUS! FINALLY! A facebook (and other site) blocker that works on firefox without shutting it down! I LOVE IT! Thank you James Anderson!

Very easy to set up and has been helping me a lot with my productivity. Would recommend to other users for sure.