This refurbished Dell 9020 arrived on time and in good condition.  I t was easy to install and seemed in the beginning to work very well.  Unfortunately, in the first month I had it, it blue screen four times.  My seven year old computer had never blue screened on me  and the other refurbs we have here all work very well.  I called Skytech and they were not much help.  The said call Amazon.  I called Amazon and they immediately replace the machine.  Thank-you Amazon you were great.  As I write this review I am installing the replacement computer.  If I have more problems I will update this review.