Excellent NVR. Easy to set up. BUT if you're using a Mac to view (on any browser), it will not work, as Hikvision still use a legacy NPAPI plug-in. Hikvision customer support will not deal with end users so no help there. CCTV Kits suggested I use Seamonkey browser or Chrome. Both of these browsers have stopped using these old legacy plug-in's as well. Also, the fan is SO LOUD. Very disappointed.