I went into this series knowing that it was going to be different than the other two (simply because the endless repititions ended with the final arc of Kai). That said, the series still felt like all filler to me. It focused more on humour than violence, which is something that is unexpected from Higurashi I thought.
I still liked it though, simply because it's only five episodes long.
Higurashi no Naku Koro ni Rei gets Ivo's Seal of Approval.