We are consultants and tested the 3rd generation models that were excellent.  BUT then we recommended on of these and the client has had no end of shutdowns and loss of video.  Replacing it now with a new unit.  Just then our OWN unit, with a 480GB SSD from Crucial began to shut off video.  NOTHING makes the HDMI video come back.  After about 15 - 20 minutes , and removing the power cable the system starts up again with video.  There is definitely some kind of video problem with these units and there quality control.