Summary: I was a bit leery when I purchased this computer because I have never purchased a 'refurbished' computer before. But I have to say this computer is very impressive. The OS came pre-installed (which was handy) so all I had to do was plug in my monitor, mouse, and keyboard and I was off and running. The only drawback to that, which others have mentioned here, is that you do not have an OEM install disc should you ever need to re-install the OS.
Summary: I have had this system for over 5 months and I must say that so far it has been amazing. This comes with 32 ram (could you ever use all that?), i7 processor 3.4, GTX 650 video card (not a cheap one...high end on lower side) and 1 TB hard drive. I play WoW mostly for entertainment (a few others) and the graphics are superb with all. I have had no gaming issues with playability or downloads off of Steam.