I have purchased several Dell refurbs in the past and am always nervous everytime I do.  This machine has been great thus far.  It came in good packaging and is clean.  I can tell it was used but it looks very nice/new.  I did swap the hard drive and didn't realize that the 7150 takes an mSata style hard drive.  So far so good though.  If something changes i'll be sure and update this review.