No scratches.  No dust.  If it weren't for the stickers saying it was a refurb then I would think this was a brand new computer.  The only thing to be aware of is the proprietary power supply, which provides an 8-pin connection to the motherboard instead of the standard 20 or 24-pin.  This required an adapter.  After that, I was able to use a larger ATX power supply, upgrade the video card, RAM, and HDD to an SSD.