Got the unit yesterday and returned it today.  OK, I know it's used so the scratched off paint was not a deal breaker.  The side panel to access the interior was flopping around, like nobody bothered to properly close it before shipping.  The deal breaker was, it won't start.  I called to return it and they had me talk to Dell tech support which was useless.  Before I hung up the Amazon rep had me do an unplug/hold the start button for 45 seconds routine and it started!  I had to shut it down during the set up process and guess what?  It wouldn't start a second time and I went through the whole routine again, to no avail.  The return was accepted luckily.  Don't think I'll try another refurb.