nice gui, statistics, and lot of options, nice database, categorization, and frequently updated....just can't rate this better than worst because it contacts many servers in background without my knowledge and choice and option to turn it off, meaning even if I disable all additional options, so had to block them via hosts file (apps.ghostery.com, cdn.ghostery.com, collector-hpn.ghostery.net, api.ghostery.net, safe-browsing-quorum.privacy.ghostery.net, cdn2.ghostery.com, d.ghostery.com, cmp-cdn.ghostery.com)...looks like tracking