I bit the bullet and spent $350 on a refurbished machine when there were many that were much cheaper....with similar specs. The first thing that failed was the power supply.  Ok, I guess that can happen with a refurbished machine.  I replaced it and all was well again, until the computer, once again, kept randomly shutting down.  This time, the error read that the SSD could not be found.  This was supposed to be a brand new SSD.  I checked all cables and ran third party diagnostics, and the SSD continued to fail.  I just replaced it with a new Samsung and it is running OK again.  During the cloning process, I had to start over twice as the SSD kept failing. The SSD provided with this refurbished machine had 3517 hours on it........Less than 147 days of use.....including Sleep Mode.  I guess if you're going to spend $350.00, go for a new one.  You'll have less frustration and less headaches.  thankfully I was able to save my OS and my data. And my $350.00 refurbished machine has now cost me $485.99.