Overall the device is ok, had some problems with one of the monitors. It flickers, contacted the vendor after Amazon. All they offered was to return the Entire Unit, all I wanted was to replace the bad monitor. One week after that, upon trying to boot system it reported that the hard drive could not be found. After contacting vendor, was told that nothing could be done due to the unit being refurbished. Went into setup and ran diagnostics, after that unit works again. Until next time !!