Bess was a joke. They only used it for one year here, They wanted to replace it sooner but they couldn't. My schools current filter is decent, They are loose on blocking, but everyonce in a while the teachers will decide to be stupid and have the filter block sites like ctrl alt del.
It also has a good handle on alternate ways to get past things....they have both I.E. and fireon there system, plus most of the alternate ones...