This unit has been working fine since I first hooked it up. Instructions are simple to follow. My advice is to locate it with plenty of space around it Not sitting on another heat-generating device such as a Mac mini (as I did - the red light started flashing after a couple of hours and after moving it to a more ventilated spot, no issues to report). I wish all my stuff were this trouble-free. It's fast, does the job and I don't have to think aboit it.