The computer has worked well for me.  I've had a few problems with it, but they have not stopped it being useful.  I have a 4 TB external powered hard drive attached and it won't boot with it attached.  I have to disconnect the hard drive to get it to boot even when I remove USB in the boot sequence.  If you plug the drive in while in the boot program, it locks up.  I can't find a firmware update that would fix the problem.  We've also had a couple of machine crashes that aren't explained.  We use it for storing videos from 4 security cameras, and it has worked well as long as make sure that it is running.  We don't use it for daily activities other than the video cameras.