Great flexibility Rated 5 out of 5 stars
Great to have multiple sets to block at different times. The "X minutes every Y hours" limit is much nicer than a single timeout -- it means I can limit myself to 15 minutes in the morning and 15 minutes in the afternoon. The countdown timer visible in the navigation bar is a great feature not seen on other blockers. Having options of no password, a user-defined password, or a random string to enter is much nicer than the draconian access control measures that some blockers foist on users. Linking to the blocked URL is a nice touch for when it becomes unblocked.