I have two of these units and IMO they are not built very well.
Its true that the components are better than the Chinese boxes but both of my units stopped working and after inspection, the cooling fans burned out (wires were melted at the fan itself). The way these units are wired, it is a huge PITA to replace the fans.
Also, there is no thermal protection to shut down the drivers when the fans fail.
I DO NOT recommend these units.
So good for parts for a diy person?