Received this unit the end of August and waited to review it.  I was so apprehensive when I purchased this that I contacted the company before receipt to ensure I had someone to talk with if I encountered any problems.  They gave me a telephone number for contact...I never had to use it but thought it was an exemplary part of their business.I am visually impaired and being 'tech savvy' is not one of my strong points.  I was concerned about the signal I would receive from the 'external dongle' and that was not a problem at all.  You might laugh at the one problem I had that took me the longest...It was connecting the monitor to the unit.  Had 3 different flashlights that I used...Those plugs with the pins are so problematic for me.The value is outstanding, the thickness of the unit is perfect and the tech support is definitely there if needed.  It ran slowly at first but I attributed that to the fact an external backup was being done by a company.  Now all is up to a nice speed and I am most satisfied with that part of the system.I did enroll In a two year 'warranty' in the case of a failure just to ease my mind.  This unit is quiet, economical and fast.  So perfect for my aging years...I also read available information both from the company and on-line resources prior to hooking it up..Glad that I did as I would have done the wrong thing several times.So far, so good and this has exceeded my expectations.  Will update with any problems I might have but don't expect any.Most highly recommended.